Originally posted by lander: <BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>
Does anyone know the physical reason why humans need sleep? ... and not the JMAN level answer of "cause we get tired".
I've heard it's because of an excess buildup of C02, but I can't verify this ... <HR></BLOCKQUOTE> I found the question quite interesting, go to
this link for a short answer and go to
this one for a extensive one. Now if you excuse me, i'm going to take a nap