Prehistory is the period of time which came before history was recorded. Although it can mean the period of time before there were humans, it is usually meant to depict the period of time before humans invented writing.
Regular Websites
National Geographic's Genographic Project follows the team of investigators as they work to find out about prehistoric footprints found in Botswana. - Atlas of the Human Journey
https://genographic.nationalgeographic.com/genographic/atlas.html
The BBC's Science and Nature section contains details about the first Europeans, Neanderthals and the Ice Age as well as the close call homo sapiens had with extinction. - BBC: Prehistoric Life
http://www.bbc.co.uk/sn/prehistoric_life/human/human_evolution/index.shtml
The official site of the Discovery Channel's television show about the earliest discovery of a hominid offers details about her discovery, an interactive handbook, and a video of the details of the discovery. - Discovering Ardi
http://dsc.discovery.com/tv/ardipithecus/ardipithecus.html
Fossil Fragments: The Riddle of Human Origins
Yale University presents this website which traces the history of fossil hunting. Also offers photographs of the Bronze Age and other prehistoric exhibits. - Fossil Fragments: The Riddle of Human Origins
http://www.peabody.yale.edu/exhibits/fossils/
Museum web site delves into humans who lived during the Ice Age, and contains sections about the Natural World and people who lived during the Stone Age. - Virtually the Ice Age
http://www.creswell-crags.org.uk/Explore/virtually-the-ice-age.aspx