http://www.stoneageinstitute.org/
A site showing a range of different approaches taken to understand the Stone Age by a research institute dedicated to Stone Age research.

    http://www.mnh.si.edu/museum/VirtualTour/Tour/First/Human
A virtual tour of the Smithsonian Institution's National Museum of Natural History, concentrating on human evolution.

    http://www.leakeyfoundation.org/
The site of the Leakey Foundation, devoted to funding research on human evolution.

    http://www.archaeologyinfo.com/
A good resource for information regarding both the archaeological and physical anthropological aspects of human evolution, with useful links.