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4600 BCE
Earth was formed
Earth was thought to have been formed 4.6 Billion years ago (4600 Million years ago) by a collision that also created the sun. -
3800 BCE
1st forms of life
They think 3.8 Billion years ago was when life started to form on planet Earth -
2450 BCE
Oxygen entered Earth
Scientists believe oxygen entered Earth close to 2.45 Billion years ago -
2100 BCE
1st Eukaryotes
Close to 2.1 Billion years ago, Eukaryotes organisms entered the Earth. They were believed to be more complex and bigger -
600 BCE
1st multicellular life
600 Million years ago, the first forms of multicellular life came to Earth -
443 BCE
Ordovician Silurian mass extinction
The Ordovician Silurian extinction was the second biggest extinction of Marine life -
359 BCE
Late Devonian mass extinction
People thought it would affect the insects and plants but it wiped out all of marine life -
270 BCE
Pangaea formed
Pangaea was a continent that existed during the Paleozoic and early Mesozoic eras. -
248 BCE
Permian mass extinction
This was the boundary between Permian and Triassic geological periods. It is the Earths most known extinction events with up to 96% of all marine species and 70% of terrestrial vertebrate species becoming extinct -
200 BCE
Pangaea begins to break up
Pangaea begins to break up around 200 Million years ago during the early Jurassic period -
200 BCE
Triassic Jurassic mass extinction
This is one of the most major extinction events of the Phanerozoic eon that affected the lands and the oceans. -
65 BCE
Cretaceous Tertiary mass extinction
This was a mass extinction that took away 3/4 of the plant and animal species on earth -
2 BCE
1st Homo sapiens
Nearly 200,000 years ago, the first Homo Sapiens were on Earth. Most of the first skeletons come from Africa or Southwest Asia
