Evolution of life on earth
Evolution of life on Earth Date. Gya . Event. 14 Sep4.1First known "remains of biotic life " found in 4.1 billion-year-old rocks in Western Australia . [5] [6] 21 Sep3.8 First Life ( Prokaryotes ) [7] [8] [9] 30 Sep3.4 Photosynthesis 29 Oct2.4 Oxygenation of Atmosphere 9 Nov2Complex Cells ( Eukaryotes ) 5 Dec0.8 First Multicellular Life [10] 7 Dec0.67Simple Animals 14 Dec0.55 Arthropods (ancestors of insects, arachnids) 17 Dec0.5 Fish and Proto-amphibians 20 Dec0.45 Land Plants 21 Dec0.4 Insects and Seeds 22 Dec0.36 Amphibians 23 Dec0.3 Reptiles 24 Dec0.25 Permian-Triassic Extinction Event , 90% of Species Die Out 2 5 Dec0.23 Dinosaurs 26 Dec0.2 Mammals 27 Dec0.15 Birds 28 Dec0.13 Flowers 30 Dec, 06:240.065 Cretaceous–Paleogene extinction event , Non-avian Dinosaurs Die Out [11]