Mustang Post
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Life Before Us!!!?!?!?!?
It has come to my attention that there happens to indeed be life that has lived long before us! It's been here for as long as the Earth has been around, which is about 46 billion years! It's insane!
Many Eras!?!
Yep, there are 3 other eras of the world before us, and two other periods within our own era! There's the Precambrian, the Paleozoic, the Mesozoic, and the Cenozoic eras!
Some Images of these Wondeful Eras
The Precambrian
The Precambrian Era was the start of the world. it was very cold for a while, then it became very hot from the amount of CO2 in the air. Bacteria called Cyanobacteria lived on Earth back then! It ended with the melting of the glaciers
The Paleozoic
The Paleozoic Era was when the earth was mostly covered in water. It was warm back then and the animals evolved to have harder shells, one of those animals is called a Trilobite. It ended with the Permian-Triassic mass extinction.
The Mesozoic
The Mesozoic era was an era that was warmer than our era. This Era contained most of history's dinosaurs! The land was mostly one big super-continent that slowly started to break up throughout the era. It ended with another mass extinction.
The Cenozoic Era!!
Our Own Era
The Cenozoic Era is the era that our life is taking place in. It consists of 2 or 3 periods depending on who you ask, those periods are the Paleogene, Neogene, and Qauternary, or the Tertiary and the Quaternary. Each period is made of different epochs, we currently live In the Hologene Epoch! Early Cenozoic era was warmer than it is now, and then it went cold. Severe ice ages happened every 100,000 years. This era contains many of the modern animals of today!