This timeline is based on studies from paleontology, developmental biology, morphology and from anatomical and genetic data. The study of human evolution is a major component of anthropology.

This chart from Credit Suisse offers a timeline of the key market, regulatory, and technological events in the U.S. stock market. ( h/t JC Parets at All Start Charts ) chart ...

Previously, scientists thought the Homo genus didn't split off from the more primitive Australopithecus species — which the famous "Lucy" fossil belongs to — until about 2.3 million years ago.

Timeline: Evolution in the U.S. Classroom [Updated] More by The Editors. Subscribe to Scientific American to learn and share the most exciting discoveries, innovations and ideas shaping our world ...