The research is mounting up that we might not be alone in this big wide world. So what's the likelihood that aliens are out ...

Billions of years ago, another planet smashed into Earth. An event of this epicness could have created our Moon. It also ...

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

From mudstones on Mars to strange gases in exoplanet atmospheres, tentative evidence for extraterrestrial life is starting to ...

Following speculation that comets could have been alien spacecrafts, more and more experts in the field are convinced that ...

Some scientific breakthroughs may be lost to time due to scandal and redaction, while others are simply a case of waiting for ...

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How did life begin on Earth? While scientists have theories, they don't yet fully understand the precise chemical steps that ...

Polling shows that nearly half of Americans now believe aliens have visited this planet—and that the number who aren't sure ...

"The universe is a pretty big place. So if it's just us... seems like an awful waste of space," goes a line from the 1997 film "Contact." In the movie, Jodie Foster plays Dr. Ellie Arroway, a radio ...

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