>>12
1) Did you not read the wikipedia article? We don't yet know what exactly the original purpose of sleep is for.
And my point is that the explanations put forth here are unsatisfactory.
2) You seem to be confused. Natural Selection does not work that way.
Oh, shut the fuck up. I know how natural selection works, and if you had any experience with evolutionary biology besides reading the Wikipedia article on Gould, you'd know convenient short-hand when you saw it. My use of the word ``solution'' does not imply look-ahead or intelligence.
The original purpose may even have already been rendered unnecessary long ago by another process.
Something that renders an organism unconscious and vulnerable to attack for extended periods of time does not stick around after it's outlived its usefulness.
5) You haven't given an alternative "solution".
That's because I don't have one. I'm only pointing out the unsatisfactory nature of yours.
Since you don't know the reason and you obviously don't know what you're talking about in a larger sense, none of your arguments are valid.
lrn2logic, dipshit.
External testicles are not the norm by any stretch of the imagination. Only a relatively few species have external testicles.
I know. That was much of my point. The myth that external testicles exist for the sake of temperature regulation persists all the same, and it's not satisfactory for the same reason your bullshit explanations about sleep aren't.
That is, all the "criticisms" I've seen against the temperature regulation hypothesis have been arguments from personal incredulity, a logical fallacy.
Are you fucking kidding me? External testicles exist as advertising towards mates: the bearer can afford to keep something as important as testicles outside of his body, where they are easily damaged or lost, and therefore he is a strong mate. Similar to how the tails of many birds are actually significant handicaps to the birds themselves.
If you aren't even aware of this (now widely accepted) hypothesis (presumably because you get all of your information from woefully incomplete Wikipedia articles), perhaps you shouldn't be trying to lecture other people about how evolution works.