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Everyone's favorite hippo is turning 1

Japanese trains save deer with sound effects

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SpaceX's latest mission prepares to make history

These new blood tests aim to find cancer before it's diagnosed

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Don't miss the 'super blue blood moon' on Jan. 31

Chameleons add glow-in-the-dark bones to long list of cool traits

One woman met a stray dog — and changed everything for a forgotten breed

Do lobsters feel pain?

With puppies and kittens, who needs the Super Bowl?

These biological illustrations are as profound today as they were in the 19th century