History Of Life On Earth

The first life forms on the planet were microscopic, single-celled organisms, it took billions of years before more complex creatures evolved, first jellylike bodies, and then armored shells on their outsides, and finally the first backbone and the beginnings of fish.

Life evolved in the sea, in a water-bound planet, but landmasses slowly appeared and aquatic life began to explore different ways to colonize it. Plants were the first pioneers, then insects to feast on them, and then each other.

It took a long time for vertebrates to really take over the land, but once they did, there was no turning back. Reptiles seemed to win the race, some becoming the biggest creatures to ever walk the Earth. Dinosaurs dominated for 150 million years, but they weren't alone.

The dinosaurs had a long and glorious reign, but it was not to last, and with their passing, a land of opportunity was laid bare for the little mammals that had scampered about their feet.