Ancient Mars may have had an environment capable of harboring an underground world teeming with microscopic organisms, French scientists reported. But if they existed, these simple life forms…

Unlike the lonely sun, about half the stars in our Milky Way galaxy are in a long-term committed relationship with another star, orbiting each other in a celestial marriage called a binary system. …

Hurtling through the solar system at hypersonic speed on Monday, NASA's DART spacecraft slammed itself into a distant asteroid in a test of the world's first planetary defense system, designed to…

Ten months after launch, NASA's asteroid-deflecting DART spacecraft neared a planned impact with its target on Monday in a test of the world's first planetary defense system, designed to prevent a…

When he cofounded the startup Helios four years ago, Jonathan Geifman was focused on space travel, not climate change. But as his team worked on one challenge—how to produce oxygen on the moon—they…

By one count, more than 2.5 quintillion bytes of digitized information are generated on Earth every day. That’s more data than all the words spoken by all the humans who ever existed, using generous…