The Human LineLife & Evolution Homo habilis 2.4 million years agoNotable "Handy man," an early Homo species associated with stone toolmaking. ▲ 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 → First stone tools → Genus Homo appears → Homo habilis Community notesLoading notes… Learn more ranked by votesBookIan TattersallThe Fossil Trail ↗Editor's pickBookRichard Leakey and Roger LewinOrigins Reconsidered ↗Editor's pickVideoSearch on YouTubeHomo habilis explained ↗Editor's pick