A meteor the size of a mountain hit Earth and ended the age of dinosaurs—but they almost survived.

Science Flips (@ScienceFlips)

66 million years ago, an asteroid 6 miles wide struck the Yucatan Peninsula. It created a tsunami 300 feet high, global firestorms, and nuclear winter. Yet dinosaurs nearly survived: smaller species adapted to darkness, herbivores could have found food in seeds. The extinction almost failed. If the asteroid had hit slightly differently, dinosaurs might still dominate Earth. Mammals (our ancestors) got lucky when extinction almost didn't stick.

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