Around 60 million to 50 million years ago, the Paleocene epoch was giving way to the Eocene, and Earth was experiencing periods of extreme warmth that went on for ages, even millions of years. The ...
A detail from The Trek Through Time, a 16-plaque diorama at the U.S. Geological Survey’s headquarters in Reston, Va. This ...
In the lush prehistoric jungles of what is now northern Colombia, a colossal predator once ruled the swampy lowlands. The Titanoboa cerrejonensis, a now-extinct snake species, is believed to be the ...
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