Koga, the Buffalo Zoo’s male silverback western lowland gorilla, who briefly escaped from his enclosure in 2012 and injured a zookeeper, died Wednesday of cardiac arrest, zoo officials announced ...

One zoo official insisted the tiger did not get out through an open door and must have climbed or leaped out. But Jack Hanna, former director of the Columbus Zoo, said such a leap would be an ...

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For decades, scientists and surgeons around the world have been trying to solve the organ donor crisis. The answer could be rolling in the mud. Did Pluto ever actually stop being a planet? Experts ...

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