| A | B |
|---|
| Oldest rock known | 4.2 billion years ago |
| last Ice Age | 10.000 years ago |
| First mammals and dinosaurs | 200 million years ago |
| Oldest fungi | 1.7 billion years ago |
| Beginning of the Paleozoic Era | 570 million years ago |
| Beginning of the Cenozoic Era | 65 million years ago |
| First humanlike creatures | 2-4 million years ago |
| First reptiles | 290 millions years ago |
| Beginning of the Mesozoic Era | 225 millions years ago |
| First birds | 160 million years ago |
| Humans begin to make tools | 500,000 years ago |
| Oldest carbon from plants | 3.6 million years ago |
| Beginning of the Jurassic Period | 190 million years ago |
| Beginning of the Quaternary period | 1.8 million years ago |
| Beginning of the Devonian period | 395 millions years ago |
