Mammoth Resurrection: 11 Hurdles to Bringing Back an Ice Age Beast

The road to bringing back the mammoth — a giant that went extinct at the end of the last ice age — is filled with barriers.

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Animal Sex: How Western Toads Do It

Western toad sex involves quiet searches, mating balls and streams of eggs.

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'Star' in Lord Byron Poem Finally Identified

Some crafty celestial sleuthing has helped astronomers identify the "star" that inspired Lord Byron's famous poem "Childe Harold's Pilgrimage."

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How Do the Chemicals in Sunscreen Protect Your Skin?

Energy from the sun's rays can cause skin damage and cancers. Sunscreens can absorb or reflect the dangerous UV light. Here's everything you need to know to read the labels in the sunscreen aisle.

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11 Body Parts Grown in the Lab

Re-growing lost organs or body parts is beyond the scope of human biology. But in recent years, scientists have successfully cultivated a range of miniature organs and human body parts in laboratories.

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Bullied Kids More Likely to Have Loaded Guns, Report Suggests

For school-aged youth, access to a gun can increase their risk for becoming a victim of or for committing a violent crime, including suicide and homicide.

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Ancient Gap-Toothed Whale Led to Evolution of Efficient Filter Feeding

A new fossil find, named Coronodon havensteini, helps explain the unusual eating habits of the blue whale.

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