These noctilucent clouds, reflecting light from the sun after sunset, have been visible in Martian skies for the past four fall seasons. Credit: NASA / JPL-Caltech / MSSS A rover got a new view of ...

Don't worry, we're not being invaded by aliens — not yet anyway; this "UFO" is nothing more than a rare cloud. Looking like something out of an alien invasion movie, the massive 'lenticular cloud' ...

Astronomers have recently detected potential signs of microbial life on the exoplanet K2-18b, an ocean-covered world located 120 light years from Earth. This discovery suggests that the planet could ...