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Earth 65 mya

The Americas 65 million years ago just before the extinction of dinosaurs after an impact in the Yucatan Peninsula (center). Our planet was warmer and had many more forests and almost no ice caps during the end of the Cretaceous Period.

University of Puerto Rico at Arecibo

Over the past 750 million years, our blue marble has gone through remarkable changes; continents have shifted, ice ages have come and gone, sea levels have risen and fallen, and one-time deserts have turned green, allowing creatures to crawl out of the oceans and live off the land.

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