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Geologists have been able to identify crucial episodes in life’s history.
Imagine an enormous, lush rainforest teeming with life...in the Arctic.
So if we want to know how we got here, we have to understand how "here" got here.
The Paleozoic Era is one of the most chaotic times in Earth's history. Find out why!
The Cenozoic marks the rise of organisms that look a lot like us.