What is Life? 生命的40亿年历程 2 Ma: First Hominids 230-65Ma 4550Ma: Formation of the Earth Homirid出 Memmeis ca.380 Ma: Land plares First vertebrate land animals 生celluer lite 4527Ma Eukaryotes ca.530 Ma: Formaton of the Moon Cambrian exploson Ma 40 Ga ca.4000 Ma:End of the 750-635a: Z51 Ma Late Heavy Bombardment: Two Snowball Earths. frstliie 642颜 地cn ca.3500 Ma: Pha如3 nthesis start西 1Ga Protrozcie Archean 光合作用 3Ga 产生了氧气 2G5 ca.2300 Ma 2018/3/20 1 Atmosphere beoomes oxygen-nch; 7 st Snowba■Earh2018/3/20 1 7 What is Life? 生命的40亿年历程 光合作用 产生了氧气