Precambrian time, the time prior to 4.6 billion years ago : During this time period we see the evidence of a first type of multi-celled organism, it represents what jellyfish of today look like. The final stages of the Precambrian were known as an ice age. 3 billion years ago the Earth's atmosphere was lacking oxygen. Eukaryotic cells were formed 1.5 billion years ago.
Paleozoic time, 542-251 million years ago: Animals move onto to land 440-410 million years ago. Mammals were evolving around 310-275 million years ago. The continents and oceans were forming around 440 million years ago.
Mesozoic time, 252-60 million years ago: During this time we see the Permo-Triassic extinction which was roughly 250 million years ago, when this happened it wiped out nearly all life on the earth at this point but opened up a new way of living. We see the rise of all types of reptiles and some dinosaurs. The Jurassic period was full of life and dinosaur species this lasted 200-145 million years ago. The extinction of dinosaurs happened roughly 60-65 million years ago.
- Cenozoic era, 65 million years ago- to present day:
- We see the first initial rise of the Himalayan Mountains which was 50 million years ago.
- The Woolly Mammoth was a very dominant and well known species, which were hunted until there extinction about 10000 years ago.
- We see the evolution of Homo sapiens 200000 years ago.
- We see many events happening within this time era, we see colonies beginning to form and thrive. One colony we see is the Mayans, who were the ones who created the calendar we famously know which was made around 3114 BC.