Geological Timeline Reflection

In this project, we created a geological timeline of Earth's history. Three major events in Earth's history are the first evidence if life, bacteria, in the Archeozoic period, Pangaea breaking apart at the end of the Triassic period, and mammals starting to appear towards the end of the Triassic period. Bacteria appearing on Earth is a critical event since it was the beginning of life and set off a chain reaction that led us to today. Pangaea breaking apart is an important event on Earth since it created the continents we live in today. Lastly, mammals appearing and eventually dominating the Earth is a signification event on Earth since it carved the path for humans to evolve.

The scale of Earth's history surprised me. Not much happened in the very beginning and many major events happened towards the end of the timeline. More than half of the timeline were taken up by the Precambrian era. Humans evolved at the very tip of the timeline, only taking about a couple millimeters, when we had 9.2 meters total.

In our short amount of time on Earth, we have raised carbon dioxide levels, destroyed natural habitats, and much more.We live in the Cenozoic era, which has lasted about 131 million years. The other eras last from 212 to 4,200 million years. It took millions of years for bacteria to evolve into marine animals. And it took millions of years for those animals to travel onto land. We have changed Earth extremely quickly.

One question I have is what specific types of animals lived in each period.

https://commons.wikimedia.org/wiki/File:Pangea_political.jpg

https://commons.wikimedia.org/wiki/File:Eomaia_scansoria.JPG