"Liar42" <liar42 at aol.com>:
> ... In the rest you seem to overlook that there is enough time for reproduction
> and many kinds just having certain times for that so that that sleep does not
> have to be in the way of the ability to have children, all the more for a
> woman, as when the time comes there might be enough males there and maybe even
> more than appreciated.
But the individuals that dont need to sleep might be more able to
establish dominance over others and hence be more reproductively
sucessful. I do admit that such evolutionary arguments dont always
work. Evolution is known to be imperfect and there are random
effects.