Human Evolution
Visit the Human Evolution room of the National Museum of Natural History for a look into the lifestyles of early peoples. You can see a stone axe created one million years ago, view a diorama of a Neanderthal burial site, and discover an ivory sculpture dating back 26,000 years.
http://anthropology.si.edu/humanorigins/faq/Encarta/overview.htm

Nova Online/Ice Mummies
This PBS site has three different detailed, useful examinations of early man (and woman) and what can be learned by studying remains.
http://www.pbs.org/wgbh/nova/icemummies/iceman.html