What is Life? 生命的40亿年历程 2 Ma: First Hominids 230-65Ma 4550Ma: Formation of the Earth Horirics Memmeis ca.380 Ma: Land plares First vertebrate land animals 生celluer lite 4527Ma Eukaryotes ca.530 Ma: Formaton of the Moon Cambrian exploson 6s Ma 46Ga ca.4000 Ma:End of the 750-635a: 251 Ma Late Heavy Bombardment: Two Snowball Earths frstliie 者2M颜 传佛的 ca.3500 Ma: Photosynthesis starts 1Ga Protrozoic Archean 光合作用 产生了氧气 2Ga ca.2300 Ma 2022-3-11 7 Atmosphere beoomes oxygen-nch; st Snowba■Earh2022-3-11 1 7 What is Life? 生命的40亿年历程 光合作用 产生了氧气