When it comes to a toothache, the brain doesn't discriminate. A new imaging study shows that to the brain, a painful upper tooth feels a lot like a painful lower tooth.

Albert Einstein was 76 when he died. His funeral and cremation were intensely private affairs, and only one photographer...

Understanding how the brain perceives the passage of time could lead to treatments for mental illnesses. Why does time seem to slow down during a life-threatening situation? Our reporter falls 15 stories to find out

The first light in the universe, the light used to push spacecraft, and the light produced by kicking the head of a walrus.

"Supervolcanoes" have been blamed for multiple mass extinctions in Earth's history, but the cause of their massive eruptions is unknown.

A mysterious planet-like object orbiting a not-quite-starlike 'brown dwarf' is the most recent enigma discovered by astronomers with their ever-more powerful telescopes.

Frozen in "time capsules" of fossilized tree sap, bugs and spores from the dinosaur era have been dug up at a site in Et...

NASA, U.S. Navy and university researchers have successfully demonstrated the first robotic underwater vehicle to be powered entirely by natural, renewable, ocean thermal energy.

What do you get when you combine microorganisms and fiber optics? Mind control over mice and rats. Karl Deisseroth and h...

Going to Costco? Then you're likely to buy a lot of crap you don't need. Why?