-
4.6 billion years
The foramation of Earth. -
3,500 million years
First singled celled organism appeared -
650 million years
The first time a multicellular organism appeared. -
542 million years
cambrian expolsion -
231 million years
first dinosaurs evolve. -
66 million years
extinction of dinosaurs -
400,000 to 200,000 years
first humans evolve.