When Earth was a new planet 4.6 billion years ago it was really hot and more like mars is today until another planet crashed into early Earth and cooled it down. Earth then sucked that planet into its orbit creating our moon.
3 billion years ago
Single celled organims were the first living thing on earth. They would later develop into multicelled organisms.
600 million years ago
Stromatolites are mushroom looking organisms.
541 million years ago
small particles of rust formed and sunk down to the bottom of the ocean forming the rock layers. these particles were so small that you couldn't see them.
Multicellular orgasims allowed Earth's creatures to expand.
The cambrian explosion caused orgasims to form over and over again.