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Seeing a shark can be pretty scary. It’s okay to admit that. They are some of the ocean's most powerful predators. And yes, sharks do occasionally bite humans that enter their habitat. However, the notion that sharks are the vengeful, human-eating beasts that we see in the movies couldn’t be fa...

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The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet