The curious minds at What If explore what Earth was like during the Cenozoic Era.
Dinosaur Discovery on MSN
The world after dinosaurs - how mammals took over Earth
What starts with the asteroid that killed the dinosaurs quickly becomes a journey through the entire rise of modern life on ...
From climate change to species loss and pollution, humans have etched their impact on Earth with such strength and permanence since the middle of the 20th century that a special team of scientists ...
The Syndyoceras existed for 4.2 million years during the Cenozoic era on the North American continent. This skeletal display can be found in the University of Nebraska State Museum–Morill Hall in ...
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