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Some of our closest invertebrate cousins, like this Acorn worm, have the ability to perfectly regenerate any part of their body that's cut off - including the head and nervous system. Humans have most of the same genes, so scientists are trying to work out whether human regeneration is possible, too.
Regeneration – now that'd be a nice superpower to have. Injure an arm? Chop it off and wait for it to grow back. Dicky knee? Ingrown toenail? Lop off your leg and get two for one!
It sounds ridiculous, but there's a growing number of scientists that believe body part regeneration is not only possible, but achievable in humans. After all, not only are there plenty of animals that can do it, we can do it ourselves for our skin, nails, and bits of other organs.
Perhaps humans don't regrow body parts because, unlike worms, they have an idea 'how much that stings.'
(Score: 2) by maxwell demon on Saturday December 03 2016, @07:48AM
But apparently you used the other eye for your spell-checking. :-)
(I have no idea what 20/400 means, but with a large number, I guess it's very bad).
The Tao of math: The numbers you can count are not the real numbers.
(Score: 0) by Anonymous Coward on Saturday December 03 2016, @11:49AM
I'm pretty sure the two numbers are distance at which you can resolve something, and distance at which normal vision can resolve it.
If you can read a street sign at 400 ft, mcgrew had to be within 20 ft to read it.
(Score: 2) by mcgrew on Saturday December 03 2016, @07:56PM
That's what I get for being careless, and it's the kind of mistake I shouldn't be making, ever.
20/20 is normal eyesight. 20/400 means what I can read 20 feet (ft~1/3m) a normal sighted person can read at 400 feet. Now I can read at 20 feet what a normally sighted person can't see any farther than 16 feet (20/16). The doctor said that 98% of people's vision is better than 20/25 after surgery.
It was correctable with glasses before surgery, now I don't need glasses, even reading glasses, and I'm 64 years old. Best thousand bucks I ever spent!
mcgrewbooks.com mcgrew.info nooze.org