Saturn's tiny, frozen moon Enceladus could hold the secrets to extraterrestrial life.

Titan, the largest moon of Saturn, could be the most alien world in our solar system.

Scientists are studying Mars from every angle in preparation to send the first human astronauts to the Red Planet. Data from the Curiosity rover has proven invaluable.

Mars is home to Olympus Mons, the largest volcano in the solar system, which covers an area the size of Arizona.

The dinosaurs died off after a massive asteroid strike with a billion times more energy than the atomic bombs dropped on Hiroshima. A team at NASA studies the impact to learn more.

In February 2013, a stunning sight in the sky over Russia made international headlines. The light of an asteroid hurtling toward Earth was brighter than the sun.

Astronaut Mike Massimino calls solar wind, "the biggest obstacle we have for exploring our universe."

More than 20 solar storms a day can occur on the surface of the sun. These energy surges can cause real problems down on Earth.

Supermassive black holes aren't just spinning at the center of galaxies. They may actually be creating galaxies.

Stripping away the Milky Way's stars, planets, rocks and dust reveals a massive black hole lurking just 26,000 light years from Earth.

Stripping away the Milky Way's stars, planets, rocks and dust reveals a massive black hole lurking just 26,000 light years from Earth.

Astronaut Mike Massimino calls solar wind, "the biggest obstacle we have for exploring our universe."

More than 20 solar storms a day can occur on the surface of the sun. These energy surges can cause real problems down on Earth.

The dinosaurs died off after a massive asteroid strike with a billion times more energy than the atomic bombs dropped on Hiroshima. A team at NASA studies the impact to learn more.

In February 2013, a stunning sight in the sky over Russia made international headlines. The light of an asteroid hurtling toward Earth was brighter than the sun.

Scientists are studying Mars from every angle in preparation to send the first human astronauts to the Red Planet. Data from the Curiosity rover has proven invaluable.

Mars is home to Olympus Mons, the largest volcano in the solar system, which covers an area the size of Arizona.

Saturn's tiny, frozen moon Enceladus could hold the secrets to extraterrestrial life.

Titan, the largest moon of Saturn, could be the most alien world in our solar system.

On March 24, 1967, men see an unidentified object hovering over Montana’s Malmstrom Air Force Base, home to nuclear weapons, which are all disabled simultaneously.

Southeast of Mexico City, hundreds goats are found dead and completely drained of blood. Is this the work of the legendary chupacabra?

Horses and cattle have been found dead around the world. The animals are found to be drained of blood, with their organs surgically removed. Investigators are stumped as to what could be responsible.

A fireball in the sky over Sri Lanka in 2012 is followed days later by a mysterious downpour of red rain. During the search for a rational explanation, investigators find evidence of strange living cells with no earthly comparison.

Bizarre, hairless, blue-eyed and hunch-backed creatures have invaded Texas, attacking and mutilating livestock. Now there is evidence they are breeding and their population is set to explode. Scientists are mystified, the authorities are in denia ...

Why would sailors mysteriously vanish from a boat, leaving behind all of their equipment with no signs of struggle?

Mysterious phenomena and bizarre sightings seems to follow one distinct geographic line across America: a paranormal highway.