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It worked, first time.
That's the forced-PWM spread-spectrum version of that LMR38020
high-voltage switcher chip. It sees 48 volts in that circuit.
The spread-spectrum makes a serious amount of jitter, but it doesn't
seem to make much noise on the -24 out. They must do some clever
spectral shaping, vaguely something like 2nd order delta-sigma or
something.
https://www.dropbox.com/scl/fo/0igyxnngijt2tugyi1biv/ADwnYrtpZsn5AelMMja8Y0o?rlkey=a2hx2xharlb83dr9ccxst9jvq&dl=0
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
It worked, first time.
That's the forced-PWM spread-spectrum version of that LMR38020
high-voltage switcher chip. It sees 48 volts in that circuit.
The spread-spectrum makes a serious amount of jitter, but it doesn't
seem to make much noise on the -24 out. They must do some clever
spectral shaping, vaguely something like 2nd order delta-sigma or
something.
https://www.dropbox.com/scl/fo/0igyxnngijt2tugyi1biv/ADwnYrtpZsn5AelMMja8Y0o?rlkey=a2hx2xharlb83dr9ccxst9jvq&dl=0
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
On 2025-10-02 20:50, john larkin wrote:
It worked, first time.
That's the forced-PWM spread-spectrum version of that LMR38020
high-voltage switcher chip. It sees 48 volts in that circuit.
The spread-spectrum makes a serious amount of jitter, but it doesn't
seem to make much noise on the -24 out. They must do some clever
spectral shaping, vaguely something like 2nd order delta-sigma or
something.
https://www.dropbox.com/scl/fo/0igyxnngijt2tugyi1biv/ADwnYrtpZsn5AelMMja8Y0o?rlkey=a2hx2xharlb83dr9ccxst9jvq&dl=0
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
That red feedback wire could pick up switching noise from the coil field. >Better keep it away from the switch output wiring.
Did you try teasing it, loaded, with slow rising input?
I've blown some inverting circuits that way.
Arie
On 10/2/2025 2:50 PM, john larkin wrote:
It worked, first time.
That's the forced-PWM spread-spectrum version of that LMR38020
high-voltage switcher chip. It sees 48 volts in that circuit.
The spread-spectrum makes a serious amount of jitter, but it doesn't
seem to make much noise on the -24 out. They must do some clever
spectral shaping, vaguely something like 2nd order delta-sigma or
something.
https://www.dropbox.com/scl/fo/0igyxnngijt2tugyi1biv/ADwnYrtpZsn5AelMMja8Y0o?rlkey=a2hx2xharlb83dr9ccxst9jvq&dl=0
Nice. I wish I could dremel like you do!
Ed
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his >heart and made the stitches between heartbeats!
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex, fragile, and have entire layers that they don't need.
I have a friend who got prostate cancer and paid a bunch extra to have robotic surgery, to remove the cancer but leave everything else
working. Eventually robots will do the really delicate surgery.
Got kids?
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his >>heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex, fragile, and have entire layers that they don't need.
I have a friend who got prostate cancer and paid a bunch extra to have robotic surgery, to remove the cancer but leave everything else
working. Eventually robots will do the really delicate surgery.
Got kids?
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his >>> heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG
Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex,
fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his >>>> heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG
Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex,
fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
This would have been a design blunder, if the eye had been
designed.
Jeroen Belleman
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his >>>heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG
Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex,
fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
On Fri, 3 Oct 2025 10:32:10 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his >>>>heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG
Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex,
fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
In other critters, the blood vessels are behind the retina and nail it
to the back of the eyeball. Our blood vessels are on the inside and
block light and do not attach the retina. As people get older and the
vitreus thickens, a little shock can yank the retina off the back of
the eyeball. Fortunately, that can usually be fixed these days and the
retina can then be spot welded to keep it in place.
Retina detatch is a common side effect of cataract surgery too.
If this inverted design makes sense, I don't see why. Or how it would
have evolved incrementally from its ancestor structures.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message
news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to
slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG
Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex,
fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
This would have been a design blunder, if the eye had been
designed.
Jeroen Belleman
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of >>>>>> tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his >>>>> heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG
Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex,
fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Keeping the wiring in place through one exit hole seems perfectly sensible to me.
All the layers in the retina have a specific function.
On 10/3/25 17:42, Edward Rawde wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of >>>>>>> tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG >>>>> Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex, >>>>> fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Keeping the wiring in place through one exit hole seems perfectly sensible to me.
All the layers in the retina have a specific function.
Sure, but I don't care how the brain hides the deficiencies, the
thing is still backwards. It would have been so much easier if
the wiring had been *behind* the layer of sensors.
Better
sensitivity,
nothing in the way of the entering light and no
blind spots.
Jeroen Belleman
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of >>>>>> tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his >>>>> heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG
Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex,
fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
On 10/3/25 17:42, Edward Rawde wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of >>>>>>> tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG >>>>> Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex, >>>>> fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Keeping the wiring in place through one exit hole seems perfectly sensible to me.
All the layers in the retina have a specific function.
Sure, but I don't care how the brain hides the deficiencies, the
thing is still backwards. It would have been so much easier if
the wiring had been *behind* the layer of sensors. Better
sensitivity, nothing in the way of the entering light and no
blind spots.
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10bp6to$21rq6$2@dont-email.me...
On 10/3/25 17:42, Edward Rawde wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of >>>>>>>> tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and >>>>>> the nurse) when he peeled the top layer of cells from my retina by >>>>>> hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's >>>>>> done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG >>>>>> Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex, >>>>>> fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Keeping the wiring in place through one exit hole seems perfectly sensible to me.
All the layers in the retina have a specific function.
Sure, but I don't care how the brain hides the deficiencies, the
thing is still backwards. It would have been so much easier if
the wiring had been *behind* the layer of sensors.
Easier for who or what?
Nature isn't a human camera maker.
Better
sensitivity,
I can't find a recent article I read about why nature did it the way it did but attenuation
of incoming light (so we don't have issues glancing at the sun) was one of them.
On Fri, 3 Oct 2025 21:07:36 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 17:42, Edward Rawde wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of >>>>>>>> tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and >>>>>> the nurse) when he peeled the top layer of cells from my retina by >>>>>> hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's >>>>>> done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG >>>>>> Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex, >>>>>> fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Keeping the wiring in place through one exit hole seems perfectly sensible to me.
All the layers in the retina have a specific function.
Sure, but I don't care how the brain hides the deficiencies, the
thing is still backwards. It would have been so much easier if
the wiring had been *behind* the layer of sensors. Better
sensitivity, nothing in the way of the entering light and no
blind spots.
It may be a bit more complex than that. The nerves have all the
strength of jello, so it may be better to fix the sensors to something
solid, so the alignment can remain fixed.
Joe
On Fri, 3 Oct 2025 11:42:04 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of >>>>>>> tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by
hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's
done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG >>>>> Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex, >>>>> fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Fine, as long as there isn't a tiger or a motorcycle there.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
On 10/3/25 23:48, Joe Gwinn wrote:
On Fri, 3 Oct 2025 21:07:36 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 17:42, Edward Rawde wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of >>>>>>>>> tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and >>>>>>> the nurse) when he peeled the top layer of cells from my retina by >>>>>>> hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's >>>>>>> done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG >>>>>>> Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex, >>>>>>> fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Keeping the wiring in place through one exit hole seems perfectly sensible to me.
All the layers in the retina have a specific function.
Sure, but I don't care how the brain hides the deficiencies, the
thing is still backwards. It would have been so much easier if
the wiring had been *behind* the layer of sensors. Better
sensitivity, nothing in the way of the entering light and no
blind spots.
It may be a bit more complex than that. The nerves have all the
strength of jello, so it may be better to fix the sensors to something
solid, so the alignment can remain fixed.
Joe
Well, there are animals that have it the right way around, and
their vision appears to work at least as well.
On Sat, 4 Oct 2025 00:46:08 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 23:48, Joe Gwinn wrote:
On Fri, 3 Oct 2025 21:07:36 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 17:42, Edward Rawde wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of >>>>>>>>>> tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and >>>>>>>> the nurse) when he peeled the top layer of cells from my retina by >>>>>>>> hand with tiny tweezers. The nurse showed me the teeny tweezers >>>>>>>> afterwards and we discussed our favorite english literature. She's >>>>>>>> done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG >>>>>>>> Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex, >>>>>>>> fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Keeping the wiring in place through one exit hole seems perfectly sensible to me.
All the layers in the retina have a specific function.
Sure, but I don't care how the brain hides the deficiencies, the
thing is still backwards. It would have been so much easier if
the wiring had been *behind* the layer of sensors. Better
sensitivity, nothing in the way of the entering light and no
blind spots.
It may be a bit more complex than that. The nerves have all the
strength of jello, so it may be better to fix the sensors to something
solid, so the alignment can remain fixed.
Joe
Well, there are animals that have it the right way around, and
their vision appears to work at least as well.
Yes, of course. But they do the details differently.
And critters all optimize for their own world.
On 5/10/2025 4:09 am, Joe Gwinn wrote:
On Sat, 4 Oct 2025 00:46:08 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 23:48, Joe Gwinn wrote:
On Fri, 3 Oct 2025 21:07:36 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 17:42, Edward Rawde wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of >>>>>>>>>>> tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and >>>>>>>>> the nurse) when he peeled the top layer of cells from my retina by >>>>>>>>> hand with tiny tweezers. The nurse showed me the teeny tweezers >>>>>>>>> afterwards and we discussed our favorite english literature. She's >>>>>>>>> done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG >>>>>>>>> Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex, >>>>>>>>> fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family. >>>>>>>>
Admit it's weird that the light-sensitive ends of the cells point >>>>>>> *away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to >>>>>>> get to the brain somehow, so there is a hole in the retina where >>>>>>> everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Keeping the wiring in place through one exit hole seems perfectly sensible to me.
All the layers in the retina have a specific function.
Sure, but I don't care how the brain hides the deficiencies, the
thing is still backwards. It would have been so much easier if
the wiring had been *behind* the layer of sensors. Better
sensitivity, nothing in the way of the entering light and no
blind spots.
It may be a bit more complex than that. The nerves have all the
strength of jello, so it may be better to fix the sensors to something >>>> solid, so the alignment can remain fixed.
Joe
Well, there are animals that have it the right way around, and
their vision appears to work at least as well.
Yes, of course. But they do the details differently.
And critters all optimize for their own world.
Using the active voice is misleading. Random mutations mostly make their >offspring less nearly optimal in their environment, but sometimes the
change is for the better. It's a very wasteful way of adaption to the >environment, but it does work.
Intelligent design ought to work better, and we are now almost in a
position to practice it, but intelligent designers are thin on the
ground, and the woods are full of designers who think that they are >intelligent.
On 5/10/2025 4:09 am, Joe Gwinn wrote:
On Sat, 4 Oct 2025 00:46:08 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 23:48, Joe Gwinn wrote:
On Fri, 3 Oct 2025 21:07:36 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 17:42, Edward Rawde wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and >>>>>>>>>> the nurse) when he peeled the top layer of cells from my retina by >>>>>>>>>> hand with tiny tweezers. The nurse showed me the teeny tweezers >>>>>>>>>> afterwards and we discussed our favorite english literature. She's >>>>>>>>>> done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG
Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex,
fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family. >>>>>>>>>
Admit it's weird that the light-sensitive ends of the cells point >>>>>>>> *away* from the light, while the wiring runs over the side from >>>>>>>> which the light comes in. At one point, all these nerves have to >>>>>>>> get to the brain somehow, so there is a hole in the retina where >>>>>>>> everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Keeping the wiring in place through one exit hole seems perfectly sensible to me.
All the layers in the retina have a specific function.
Sure, but I don't care how the brain hides the deficiencies, the
thing is still backwards. It would have been so much easier if
the wiring had been *behind* the layer of sensors. Better
sensitivity, nothing in the way of the entering light and no
blind spots.
It may be a bit more complex than that. The nerves have all the
strength of jello, so it may be better to fix the sensors to something >>>>> solid, so the alignment can remain fixed.
Joe
Well, there are animals that have it the right way around, and
their vision appears to work at least as well.
Yes, of course. But they do the details differently.
And critters all optimize for their own world.
Using the active voice is misleading. Random mutations mostly make their
offspring less nearly optimal in their environment, but sometimes the
change is for the better. It's a very wasteful way of adaption to the
environment, but it does work.
Intelligent design ought to work better, and we are now almost in a
position to practice it, but intelligent designers are thin on the
ground, and the woods are full of designers who think that they are
intelligent.
There are interesting series on German TV about science.
Yesterday it was about origins of life and scientific experiments done and being done realated to that.
They went into the function 'smell' in finding a suitable partner, and showed experiments.
If I understood it correctly the female system gets half of its geome replaced by the male genome after pairing.
To find a genome that creates diversity (is not the same as partner) people and animals (if there is a differnce at all ;-) )
use smell.
The did genome tests, and blind tests having males smell for female blankets they liked best and that confirmed it.
Always a person with a different genome was selected.
This ensures in evolution that the system to counter 'attacks' (biologically, virusses, microbes, etc)
is added to that of the female's, and so to the kids, making thosestronger through diversity.
Was also about chemistry, very nice series.
On 5/10/2025 8:10 pm, Jan Panteltje wrote:
On 5/10/2025 4:09 am, Joe Gwinn wrote:
On Sat, 4 Oct 2025 00:46:08 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 23:48, Joe Gwinn wrote:
On Fri, 3 Oct 2025 21:07:36 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 17:42, Edward Rawde wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving. >>>>>>>>>>>>>
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and >>>>>>>>>>> the nurse) when he peeled the top layer of cells from my retina by >>>>>>>>>>> hand with tiny tweezers. The nurse showed me the teeny tweezers >>>>>>>>>>> afterwards and we discussed our favorite english literature. She's >>>>>>>>>>> done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG
Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex,
fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family. >>>>>>>>>>
Admit it's weird that the light-sensitive ends of the cells point >>>>>>>>> *away* from the light, while the wiring runs over the side from >>>>>>>>> which the light comes in. At one point, all these nerves have to >>>>>>>>> get to the brain somehow, so there is a hole in the retina where >>>>>>>>> everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Keeping the wiring in place through one exit hole seems perfectly sensible to me.
All the layers in the retina have a specific function.
Sure, but I don't care how the brain hides the deficiencies, the >>>>>>> thing is still backwards. It would have been so much easier if
the wiring had been *behind* the layer of sensors. Better
sensitivity, nothing in the way of the entering light and no
blind spots.
It may be a bit more complex than that. The nerves have all the
strength of jello, so it may be better to fix the sensors to something >>>>>> solid, so the alignment can remain fixed.
Joe
Well, there are animals that have it the right way around, and
their vision appears to work at least as well.
Yes, of course. But they do the details differently.
And critters all optimize for their own world.
Using the active voice is misleading. Random mutations mostly make their >>> offspring less nearly optimal in their environment, but sometimes the
change is for the better. It's a very wasteful way of adaption to the
environment, but it does work.
Intelligent design ought to work better, and we are now almost in a
position to practice it, but intelligent designers are thin on the
ground, and the woods are full of designers who think that they are
intelligent.
There are interesting series on German TV about science.
Yesterday it was about origins of life and scientific experiments done and being done realated to that.
They went into the function 'smell' in finding a suitable partner, and showed experiments.
If I understood it correctly the female system gets half of its geome replaced by the male genome after pairing.
To find a genome that creates diversity (is not the same as partner) people and animals (if there is a differnce at all ;-) )
use smell.
This has been done with humans too.
The did genome tests, and blind tests having males smell for female blankets they liked best and that confirmed it.
Always a person with a different genome was selected.
That's not all that difficult, only identical twins have identical genomes.
What the human tests showed up was the smell preferences lined up with >difference in the genes that generated antibodies, so the selection was >specifically aimed at producing off-spring who had the widest possible
range of potential antibodies. Hardly anybody produces the same antibody >when challenged by a foreign protein, and some antibodies work better
than others.
This ensures in evolution that the system to counter 'attacks' (biologically, virusses, microbes, etc)
It's called the immune system.
is added to that of the female's, and so to the kids, making thosestronger through diversity.
Half the males immune system is added to the half the kids inherits from
the female, which creates it's own diversity
Was also about chemistry, very nice series.
But not great at getting complex ideas across to unsophisticated viewers.
On 5/10/2025 8:10 pm, Jan Panteltje wrote:
On 5/10/2025 4:09 am, Joe Gwinn wrote:
On Sat, 4 Oct 2025 00:46:08 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 23:48, Joe Gwinn wrote:
On Fri, 3 Oct 2025 21:07:36 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 10/3/25 17:42, Edward Rawde wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of
tweezers. We both hold our breath when we're carving. >>>>>>>>>>>>>>
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and
the nurse) when he peeled the top layer of cells from my retina by >>>>>>>>>>>> hand with tiny tweezers. The nurse showed me the teeny tweezers >>>>>>>>>>>> afterwards and we discussed our favorite english literature. She's >>>>>>>>>>>> done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG
Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex,
fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family. >>>>>>>>>>>
Admit it's weird that the light-sensitive ends of the cells point >>>>>>>>>> *away* from the light, while the wiring runs over the side from >>>>>>>>>> which the light comes in. At one point, all these nerves have to >>>>>>>>>> get to the brain somehow, so there is a hole in the retina where >>>>>>>>>> everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Keeping the wiring in place through one exit hole seems perfectly sensible to me.
All the layers in the retina have a specific function.
Sure, but I don't care how the brain hides the deficiencies, the >>>>>>>> thing is still backwards. It would have been so much easier if >>>>>>>> the wiring had been *behind* the layer of sensors. Better
sensitivity, nothing in the way of the entering light and no
blind spots.
It may be a bit more complex than that. The nerves have all the >>>>>>> strength of jello, so it may be better to fix the sensors to something >>>>>>> solid, so the alignment can remain fixed.
Joe
Well, there are animals that have it the right way around, and
their vision appears to work at least as well.
Yes, of course. But they do the details differently.
And critters all optimize for their own world.
Using the active voice is misleading. Random mutations mostly make their >>>> offspring less nearly optimal in their environment, but sometimes the
change is for the better. It's a very wasteful way of adaption to the
environment, but it does work.
Intelligent design ought to work better, and we are now almost in a
position to practice it, but intelligent designers are thin on the
ground, and the woods are full of designers who think that they are
intelligent.
There are interesting series on German TV about science.
Yesterday it was about origins of life and scientific experiments done and being done realated to that.
They went into the function 'smell' in finding a suitable partner, and showed experiments.
If I understood it correctly the female system gets half of its geome replaced by the male genome after pairing.
To find a genome that creates diversity (is not the same as partner) people and animals (if there is a differnce at all ;-) )
use smell.
This has been done with humans too.
The did genome tests, and blind tests having males smell for female blankets they liked best and that confirmed it.
Always a person with a different genome was selected.
That's not all that difficult, only identical twins have identical genomes. >>
What the human tests showed up was the smell preferences lined up with
difference in the genes that generated antibodies, so the selection was
specifically aimed at producing off-spring who had the widest possible
range of potential antibodies. Hardly anybody produces the same antibody
when challenged by a foreign protein, and some antibodies work better
than others.
This ensures in evolution that the system to counter 'attacks'
(biologically, virusses, microbes, etc)
It's called the immune system.
is added to that of the female's, and so to the kids, making thosestronger through diversity.
Half the males immune system is added to the half the kids inherits from
the female, which creates it's own diversity
Was also about chemistry, very nice series.
But not great at getting complex ideas across to unsophisticated viewers.
I was expecting your answer to be 'but panteltje knows nothing..'
So you are improving.
I did not do any of those experiments except for the real life ones of course.
Did you see the series while here (German TV reception was possiblele all over the NL
started watching it in the sixties)?
They went through the DNA stuff and also showed some recent experiments
where the scientists predicted life would be recreated in the lab in a short time (few years?).
Also had a nice piece about haemoglobin and how its structure carries oxygen.
"john larkin" <jl@glen--canyon.com> wrote in message news:ege0ekpv5g21d4elgupfce9i4ss1lm3t5i@4ax.com...I suspect that depends upon "proximity" :-)
On Fri, 3 Oct 2025 11:42:04 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"Jeroen Belleman" <jeroen@nospam.please> wrote in message news:10booke$1rvv6$2@dont-email.me...
On 10/3/25 16:32, Edward Rawde wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:5pivdkdihugbp6ubbe7uoo6cr7p2j0h1vf@4ax.com...
On Fri, 3 Oct 2025 11:43:15 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
john larkin <jl@glen--canyon.com> wrote:
I was talking to the guy who repaired my retina with a tiny pair of >>>>>>>> tweezers. We both hold our breath when we're carving.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
I had a vasectomy reversal and the surgeon took beta blockers to slow his
heart and made the stitches between heartbeats!
I already take beta blockers!
I was awake and seeing everything going on (and talking to Dr S and >>>>>> the nurse) when he peeled the top layer of cells from my retina by >>>>>> hand with tiny tweezers. The nurse showed me the teeny tweezers
afterwards and we discussed our favorite english literature. She's >>>>>> done the whole P&P Pemberly tour. I turned her onto Lord Peter and PG >>>>>> Wodehouse.
Great light show.
Mammalian retinas make no sense. They are built upside down, complex, >>>>>> fragile, and have entire layers that they don't need.
They make perfect sense to me. Mine work fine.
We're keeping an eye out for glaucoma as it runs in the family.
Admit it's weird that the light-sensitive ends of the cells point
*away* from the light, while the wiring runs over the side from
which the light comes in. At one point, all these nerves have to
get to the brain somehow, so there is a hole in the retina where
everything has to pass through, causing a blind spot.
What you see is constructed by your brain.
You think you see in full detail over your field of vision but your eyes don't, your brain does it.
The brain finds it easy to paint out the blind spot.
Fine, as long as there isn't a tiger or a motorcycle there.
Is the tiger or motorcycle likely to be in the blind spot of both eyes?
If you're moving and also the tiger/motorcycle are moving then the blind
spot is clearly not an issue.
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics