When it comes to the search for life elsewhere in the universe, methane and other chemical compounds are seen as signs of ...

The Sailor Moon you watched in the ’90s erased deaths, rewrote relationships, and changed far more than most fans realized.

As the peerless "Aliens" turns 40, here are 26 reasons it's still the greatest sci-fi action movie of all time.

A planet with one side permanently roasting and the other frozen in endless darkness might still have a chance of supporting life. Researchers found that heat inside a tidally locked exoplanet could ...

Scientists are calling this find one of the most scientifically valuable meteorites ever recovered.

Seeds that flew on a NASA mission were planted, and now a sweet gum tree will be celebrated as a “moon tree” in Manhattan.

When astronomers observe distant exoplanets, they sometimes encounter a frustrating result: instead of revealing the chemical fingerprints of an atmosphere, the data appear almost completely flat.

Scientists say new technologies have reopened the debate over whether Mars could someday be terraformed, turning a once ...

Scientists suggest the Moon could act as a quarantine checkpoint before samples from Mars are brought back to Earth.

Titan, Saturn's largest moon, is home to vast lakes and seas - not of water, but of liquid methane and ethane. In this video, ...

The beloved magical-girl anime Sailor Moon is returning to theaters this August, giving fans a rare chance to relive its ...