4.1 billion years ago. All life on Earth came from one event on Earth as far as we know some time over 4 billion years ago some molecules of hydrocarbons managed to arrange themselves into a self replicating sequence called RNA which became DNA and the first life form was established on earth.
3.5 billion years ago. Over the next 500 million years the single cells became more sophisticated until the Last Universal Common Ancestor evolved into Bacteria and Archea. Amazing to think we all as well as every living thing on the planet had a common ancestor!
3 billion years ago. The first photosynthesis occurred producing oxygen in the atmosphere.
2.5 billion years ago oxygen levels high enough to react with the rocks and cause the beginning of plate tectonics.
1.2 billion years ago the first sexual reproduction begins allowing biodiversity to accelerate and evolution to favour certain traits.
800 million years ago the first multicellular organisms.leading to fungi, sponges and jellies.
535 million years ago many complex life forms begin, crustaceans, trilobites, Cambrian explosion first animals. All in the ocean.
530 million years ago first footprints on land.
480 million years ago first vertebrates.
434 million years ago first plants on land.
420 mya first fish and arachnids.
363 mya carboniferous seed plants, sharks, first four legged animals on land.
340 mya amphibians.
280 mya beetles conifers and dinosaurs.
220mya cycads
200mya viruses
175 million years ago north america splits from africa.
161 mya first mammals.
135 mya marsupials arrive in australia
145 mya south america, australia, antarctica split
130 mya flowering plants
115 monotremes like echidna, platypus
90 mya snakes
80-50 million years ago rocky mountains form
65 mya end of the dinosaurs. Followed by evolution of carnivorous mammals,
55mya song birds
40-50 million years ago india impacts asia to form himalayas.
45 million years ago andes formed by ocean plate going under south american plate.
40 million years ago monkeys raft to south america
35 mya grasses
34-23 million years ago africa impacts europe to form alps.
30 mya pigs cats
25mya deer
20 mya giraffes, hyenas, bears, giant anteater.
15mya kangaroos and cow ancestors
10mya grasslands.horses, termites
9.5mya. The Great American Interchange, where various land and freshwater faunas migrated between North and South America. Armadillos, opossums, hummingbirds Phorusrhacids, Ground Sloths, Glyptodonts, and Meridiungulates traveled to North America, while horses, tapirs, saber-toothed cats, Jaguars, Bears, Coaties, Ferrets, Otters, Skunks and deer entered South America.
6.5mya first hominids.
5million years ago panama formed linking north and south america.
5mya First tree sloths and hippopotami, diversification of grazing herbivores like zebras and elephants, large carnivorous mammals like lions and the genus Canis, burrowing rodents, kangaroos, birds, and small carnivores, vultures increase in size, decrease in the number of perissodactyl mammals. Extinction of nimravid carnivores.
4.8mya mammoth
4mya elephants, giraffes,zebras,lions,rhinoceros,gazelles,
2mya homo habilis, aurochs (early cow)