There are ancient, massive galaxies haunting the dusty reaches of our universe, invisible to the Hubble Space Telescope. But now astronomers sifting through infrared data have discovered 39 of them.

A man was diagnosed with penile ossification, a rare condition in which bone forms inside the penis.

Napping could be considered an early symptom of Alzheimer's disease.

Fish swam for their lives when they encountered a forbidding, ancient "monster" penguin that would have towered over today's largest penguin.

A team of biologists from the United Kingdom thinks that they've decoded the mystery of all the gray squirrels running around the United States with black fur.

Presidential candidate Bernie Sanders (D-VT) says he's prepared to disclose government information about UFOs if he wins in 2020.

Sometimes people have to learn the hard way that octopuses belong in the ocean — not on your face.

Here are the stories behind the most amazing images in the world of science this week. A recap of the coolest photos featured on Live Science.

Here are the facts on the U.S. children and teens killed by guns.

An explosion off Russia's Arctic coast has led to speculation that the incident resulted from a failed test of a nuclear-powered cruise missile. Do the details add up?

"Mad" Mike Hughes will have to wait until this weekend to launch after having issues with the water heater for his steam-powered rocket.