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

Want to stick to your diet? Don't tell your friends

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

Divers discover world's longest underwater cave in Yucatan Peninsula

Moscow got only 6 minutes of sunlight in December

China has stopped accepting recycling from other nations — and that's a problem

What caused 200,000 saigas to die?