Aristotle believed the planets revolved around Earth and God could not have created other worlds. Today, scientists scour the ...

NASA's Kepler Space Telescope has discovered 2,784 distant alien worlds. While some orbit within habitable zones and look ...

A single alien world can be misleading. A strange gas in an atmosphere might look promising, then turn out to come from ...

Easy: Venus is the weirdest planet in the solar system. The most distant major planet from the sun and the last stop before ...

A mysterious visitor from another star system is carrying secrets billions of years old. Its composition could reveal how ...

Scientists have found that young stellar cousins of our sun are calming down and dimming more quickly in their X-ray output ...

From lava tubes on Mars to ice pockets on Europa, subterranean environments may offer the best chance of finding life—and living safely—beyond our planet. “I was like, ‘OK, I'm pretty sure that ...

Scientists have found that young stellar cousins of our Sun are calming down and dimming more quickly in their X-ray output ...

Scientists say caves on Mars and icy moons may host microbial life and serve as future habitats for astronauts to be sent to ...

The subject of UFOs and aliens is vast and complex, making it impossible to summarize in one article. Flying saucers/UFOs made headline news throughout the world in 1947, sparked by two major, highly ...

Usually, comets are dormant blocks of rock and ice. They only wake up when they get close to a star. The intense heat causes ...

The question “are we alone” remains unanswered, but humanity may get a hint of it in the coming years as technologies are ...