In article <3002945679.1.p00511 at psilink.com>, "Jim Chinnis" <p00511 at psilink.com> writes:
> Justin Baker writes:
>>>At night, a diurnal animal is vulnerable to predation. Right. If it is
>>out and about, it will get eaten. If it is hiding away in a warm place,
>>expending little energy, it will likely save itself from probable death.
>>In fact, if one considers the probabilities of predatory attack for
>>a diurnal species at night, it soon becomes obvious that by sleeping,
>>the species increases its evolutionary potency a good bit.
>>>There may be obvious gaps in this theory, but overall I find that is a
>>useful one. It also has some interesting preadaptive implications,
>>which may or may not be obvious. I will not pursue those here.
>>>I would appreciate any comments.
>> Why do tigers, lions, and so many ferocious beasts sleep so darn much?
Also why dolphins, in order to avoid complete falling asleep and drowning,
sleep with one hemisphere at a time, rather than live without sleep at all?
