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1 BCE
Earth is formed
4.6 billion years ago.The Earth is thought to have been formed about 4.6 billion years ago by collisions in the giant disc-shaped cloud of material that also formed the Sun. Gravity slowly gathered this gas and dust together into clumps that became asteroids and small early planets called planetesimals. -
2
life arises
3.8 billion years ago.Single celled organisms evolved on earth. -
3
Eukaryotes evolve
2.7 billion years ago. Eukaryotes came into the world 750 million years after Earth was formed -
4
multi-cellular life evolves
2.1 billion years ago. multi-cellular life evolves on earth and no one knows why they evolved instead of staying single celled organisms. -
4
Pangea seperates
The super-continent separates about 200 million years ago and formed 7 smaller continents that exist today. -
5
1st homo sapiens
Homo sapiens first derived in Africa between 200,000 and 100,000 years ago -
6
Ordovician-silurian extinctions-443 million years ago
The third largest extinction in Earth's history, the Ordovician-Silurian mass extinction had two peak dying times separated by hundreds of thousands of years. During the Ordovician, most life was in the sea, so it was sea creatures such as trilobites, brachiopods and graptolites that were drastically reduced in number. -
7
Late devonian extinction-359 million years ago
Three quarters of all species on Earth died out in the Late Devonian mass extinction, though it may have been a series of extinctions over several million years, rather than a single event. Life in the shallow seas were the worst affected, and reefs took a hammering, not returning to their former glory until new types of coral evolved over 100 million years later. -
8
Permian extinction-248 million years ago
The Permian mass extinction has been nicknamed The Great Dying, since a huge 96% of species died out. All life on Earth today is dropped from the 4% of species that survived. -
9
Triasssic-Jurassic mass exttinction-200 million years ago
During the final 18 million years of the Triassic period, there were two or three phases of extinction whose combined effects created the Triassic-Jurassic mass extinction event. Climate change, flood basalt eruptions and an asteroid impact have all been blamed for this loss of life. -
Cretaceous-Tertiary extinction-65 million years ago
The Cretaceous-Tertiary mass extinction - also known as the K/T extinction - is famed for the death of the dinosaurs. However, many other organisms perished at the end of the Cretaceous including the ammonites, many flowering plants and the last of the pterosaurs. -
Pangea forms
275 million years ago the supercontinent pangea was formed
