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Impossible Image: Gravity-Defying Bighorn Sheep

climbing goat, goat facts
Gravity is totally overrated for this bighorn sheep.
(Image credit: U.S. Department of the Interior)

Bighorn sheep can climb slopes that would make Spider-Man shake his head. The above image doesn't seem possible, but it's no April Fools' Day joke; for these climbing pros, it's just another day on the mountain.

Bighorn sheep get their name from their big, curved horns on the males, which are called rams. But it's their climbing skills that turn heads. Bighorn sheep aren't as agile as mountain goats, but they are well-equipped for climbing the steep terrain that their predators can't.

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Brett Israel was a staff writer for Live Science with a focus on environmental issues. He holds a bachelor’s degree in biochemistry and molecular biology from The University of Georgia, a master’s degree in journalism from New York University, and has studied doctorate-level biochemistry at Emory University.