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Bison are North America's largest land animals

American bison are the largest land animals in North America, and they can run 30 miles per hour.

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Millions once roamed the grasslands and prairies of the Great Plains. Bison graze all year and feed mainly on grasses.

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Horseshoe crabs are closer to spiders than crabs

Horseshoe crabs are more closely related to spiders and scorpions than to crabs.

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Sea stars pump seawater instead of blood

Sea stars are not fish, and they move nutrients through their bodies with seawater instead of blood.

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Japanese giant salamanders grow five feet long

The Japanese giant salamander is the world's second-largest salamander, reaching up to 5 feet and 55 pounds.

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