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Hippos are well-loved, cumbersome, rotund mammals famous for lounging around semi-submerged in muddy pools. Gregarious herbivores, they emerge afte...

Since humans first gazed upward, the moon has hung in the sky virtually unchanged, entrancing generations of poets, artists and scientists. Once wo...

As the tallest animal on Earth, giraffes have long attracted human curiosity and respect. Their extraordinarily long necks, distinctive camouflage,...