Why the prehistoric Dimetrodon isn't considered a dinosaur
Overview of the prehistoric animal Dimetrodon.
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.Learn more about climate change and the transition to renewable energy in this interview with Phil the Fixer.
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© American Chemical Society (A Britannica Publishing Partner)Cheese comes from milk—but it's not that simple.
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Encyclopædia Britannica, Inc.Learn more about the origins of fossil fuels.
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Encyclopædia Britannica, Inc.Learn about what is believed to be the oldest soft tissue ever found, in a dinosaur fossil dating to the Jurassic Period.
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Encyclopædia Britannica, Inc.The paleontology of the Grand Canyon, Arizona, U.S.
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Encyclopædia Britannica, Inc.Findings about a small bird have scientists rethinking dino diets.
