Three of the major events in Earth's history are the mass extinction at the end of the Cretaceous period, the appearance of prokaryotic cells 3.5 billion years ago, and eukaryotic cells 2.1 billion years ago. The extinction at the end of the Cretaceous period eradicated over 1/2 of the Earth's population, including but not limited to the dinosaurs. The appearance of prokaryotes and eukaryotes was important because there are many organisms now that are prokaryotes or eukaryotes including humans. These events are important because without them, the species that exist today wouldn't exist today.
The majority of Earth's history was the Archean era and the Proterozoic era. What surprised me was how recently the dinosaurs existed. As humans, we feel they've been gone for so long but in the scale, they are very close to us.
In such a short time, we've caused so much destruction to our planet with climate change and global warming. The earth has been around for 4.6 billion years, yet our impact has been the biggest.
I want to know about life during the Archaean period more. It seems so strange that there once was a world with barely any animals or even eukaryotes. How long is the Earth estimated to continue to have life?
Here is a segment of our timeline.
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