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What Was Earth Like in Cenozoic era?

Spanning more than 66 million years, the Cenozoic Era shaped the world we live in today. From the rise of mammals to the emergence of modern humans, this era tells a story of survival, evolution, and ...
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700 million years ago, our planet’s coldest ocean temperatures arrived during a mysterious era: Snowball Earth

Parts of the ocean reached temperatures of -15°C (5°F) without freezing 717-660 million years ago, geologists and geochemists have concluded. These conditions explain some puzzling banded iron ...