Here's a fun review of archeology and prehistoric biology as painted by the new epic 10,000 B.C. The verdict: nothing, but nothing, makes scientific sense. (Domesticated mammoths? In Egypt? Saber-tooth cats bigger than grizzly bears? The Pyramids under construction 12,000 years ago?) However, Seth Shostak says it's a fun trip if you can turn off your brain long enough to hop on a woolly mammoth and just enjoy the ride.