Harvard astrophysicist Avi Loeb's speculative claim that 3I/ATLAS could be an alien AI probe ignites scientific debate, NASA ...

MARS was not always the beaming red we’re so used to seeing in space. Scientists have revealed that it was actually a “blue ...

Watch the final livestream of interstellar comet 3I/ATLAS on Jan. 22. Discover viewing details and why scientists debunked ...

Project Stargate is arguably one of the best illustrations of how state secrecy can allow extraordinary claims to persist ...

Mars is famous for its volcanoes, canyons and ancient river valleys, but some of its most active geology happens in slow ...

MAVEN has remained silent since Dec. 6 despite repeated attempts to contact it, according to NASA. As part of the recovery ...

Interstellar comet 3I/ATLAS is now barreling away from the sun, never to return to the solar system. There's one more chance ...

NASA's plans for Mars sample return are effectively cancelled as part of a bill approved by the U.S. Congress, ending efforts ...

Looking back at these 10 mistakes shows how much our understanding has moved on, and it’s a good reminder that what we’re ...

For more than a month, all attempts to reconnect with MAVEN, one of three active orbiters around Mars, have failed.