Evolution

formation of the Earth

2

Era - 3.6
Period - permain
3.6 billion years ago

dinosaurs become extinct

3

Era - flowering plants become dominant
Period - cretaceous
14 million years ago

first Eukaryotic cells

3

Era - Precambrian
Period -Cambrian
20million years ago

first birds

4

Era - Mesozoic
Period - cretaceous
140 million years ago

tertiary

5

Era -Mesozoic

Period - cretaceous
65 million years ago

First placental mammals

7

Era - Cenozoic
Period - Tertiary
24 million years ago

grass forms

8

Era - Cenozoic
Period - quarter
20 million years ago

Humans Evolve

9

Era - Cenozoic
Period-Quaternary
4 Million Year Ago