The Human LineLife & Evolution Australopithecines 4 million years agoNotable A family of upright-walking apes, including Lucy's species, spreads through East and southern Africa. ▲ MattersSaveShareTrace roots Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → First oceans → First life → Photosynthesis evolves → Great Oxidation Event → Complex cells (eukaryotes) → Multicellular life → First animals → Cambrian Explosion → First vertebrates → Jawed fish → Fish walk onto land → The amniotic egg → The Great Dying → Dinosaurs appear → Asteroid ends the dinosaurs → Early primates → Apes split from monkeys → Human line splits from chimpanzees → Walking upright → Australopithecines Community notesLoading notes… Learn more ranked by votesBookDonald Johanson and Maitland EdeyLucy: The Beginnings of Humankind ↗Editor's pickVideoSearch on YouTubeAustralopithecus explained human evolution ↗Editor's pick