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Quetzalcoatlus lived around 72 to 66 million years ago during the Late Cretaceous period, when it blocked out the sun with its 12 m (40 ft) wingspan. When it landed on the ground, it stood at a ...

When we think of wildlife, most images are rooted firmly on land. However, some animals that live in the air have evolved to spend nearly their entire lives flying, gliding, or hanging high above the ...