Learn how hibernating ground squirrels lower their body temperatures to enter a dormant state
During winter, ground squirrels hibernate in deep underground burrows. They are aroused from winter sleep by spring's warmer temperatures.
Encyclopædia Britannica, Inc.
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Encyclopædia Britannica, Inc.Erik Gregersen, astronomy and space exploration editor, discusses space junk—material left floating in space after past space missions—and how the problem is getting worse every day.
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Encyclopædia Britannica, Inc.This was a game-changer.
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NASA/ReutersArtemis II astronauts named a new crater after their commander's late wife.
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Encyclopædia Britannica, Inc.Humans might be related to these weird, hairless dogs.
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Encyclopædia Britannica, Inc.The pangolin is the only mammal in the world covered in scales.
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Encyclopædia Britannica, Inc.A jellyfish contracting its body.
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Encyclopædia Britannica, Inc.Learn what defines an organism and consider two candidates for the title of world's smallest organism—the bacteria Carsonella ruddii and Mycoplasma genitalium.
