Scientists Study 3.5-Million-Year-Old Origins of Unique Human

Scientists have proven the arch running across the top of the human foot evolved in a 3.5-million-year old human ancestor, enabling us to walk and run upright unlike all other primates.

History of Life on Earth, Overview & Timeline - Lesson

A Cranium Discovered by Cleveland Researchers Puts a Face on an Ancient Human Ancestor

The Human Family's Earliest Ancestors, Science

Lucy (Australopithecus) - Wikipedia

Australopithecus, Characteristics & Facts

Dental Detectives: What Fossil Teeth Reveal About Ancestral Human Diets : The Salt : NPR

Scientist Who Injected Himself With 3.5 Million Year Old Bacteria 'Feels Fine' - SlashGear

These are the Decade's Biggest Discoveries in Human Evolution, Smithsonian Voices

Mysterious 300,000-year-old skull could be new species of human, researchers say - National