"George Bajszar" <gyuri at usa.net> wrote in message news:8pi2p7$j4t$1 at nnrp1.deja.com...
> Perhaps sleeping has yet another purpose.
While several functions might be performed in humans during sleep
it seems to me it's purpose is to select habitat. Animals have cycles
of activities. Few need brain garbage collection cycles. I guess this
is a quibble.