At 11:08 2000-01-18 CST, Justin wrote:

>In nature, creatures *usually* exert themselves for short
>amounts of time, and then they rest.

Well Homo Sapiens is a little different, we have that sweating possibility.
So we can go on for a longer time without getting overheated.
It is the only animal that can first run for 20 km, then swim over a
500 m wide river, and then climb a tree.

- Hans