Photo: Mass Extinctions Due to Sea Level Changes, Study Says



Pteranodons are one of thousands of species that did not survive the last mass extinction, about 65 million years ago. All periods of extinction, including those usually associated with asteroid and supervolcano events—like the one that wiped out the dinosaurs—are linked to sea level changes, according to a new study.


Illustration by Dorling Kindersley/Getty Images


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