The Smithsonian Museum of Natural History uses fossil evidence to consider this question

presents interactive multimedia, research, and scholarship to create a greater understanding of the evolution of humans, and was founded by Donald Johanson, who famously discovered Australopithecus afarensis or “Lucy”

PBS' interactive activity

is the largest organization of archaeologists and publishes American Antiquity, Latin American Antiquity, Advances in Archaeological Practice and The SAA Archaeological Record (TSAR). TSAR is freely available on the website and has many articles written with students in mind

focuses on the archaeology of the historic period, particularly the impact of European colonization across the world following the voyages of Columbus. The SHA publishes Historical Archaeology and a Technical Briefs series, the latter of which is free. The SHA website has numerous excellent research tools and resources for students and teachers

publishes the popularly styled Archaeology magazine. Their website contains the latest news of archaeological activities across the world, as well as interactive activities.

raises funds to purchase land with the goal of protecting archaeological sites. They also publish American Archaeology magazine, with extensive archives available online

presents streaming media about topics of archaeological interest across the world

The archaeology page at About.com presents overviews of both plant and animal domestication

presents ongoing research on the origin of agriculture

presents cutting-edge research and interpretation on this Neolithic town located in modern-day Turkey

In this film series host Michael Wood discusses the origins of civilization across the world, beginning in the Middle East