Precambrian
When did the Precambrian Era begin?
4,543,540 million years ago
When did the Paleozoic Era begin?
540,245 million years ago
Which period did dinosaurs rule the Earth?
Jurassic
When did the Cenozoic Era begin?
65 million years ago
When did mammals that look like us start to inhabit the Earth?
0.0002 billion years ago
Where did life exist during the Precambrian Era?
On the seas
Which period were Marine invertebrates dominant?
Ordovician
When did the Mesozoic Era begin?
245,650 million years ago
Which epoch did early primates thrive?
Paleocene
When did multicellular life begin?
0.8 billion years ago
When did Multicellular forms appear?
1.2 billion years ago
Which period were jawless fish abundant?
Silurian
Which period did the survivors of the largest mass extinction spread and colonize new areas?
Triassic
Which epoch did the ancestors of bats and elephants appear?
Eocene
When did mammals arise?
0.53 billion years ago
When did Photosynthetic prokaryotes appear?
3 billion years ago
Which period had the largest mass extinction in Earth's history?
Permian
Which period did the dinosaur species become extinct?
Cretaceous
Which epoch did the first apes appear?
Oligocene
When did single-cell life begin?
3.8 billion years ago
When did Anaerobic heterotrophic prokaryotes appear?
3.5 billion years ago
Which period is called the "Age of Fishes?"
Devonian
Which period did the first angiosperms appear?
Jurassic
Which epoch did the Himalayas and the Alps form from tectonic plate collisions?
Pliocene
When did Pangea form and when did it break up?
355 Ma - 175 Ma