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 ...

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 ...

One of Britain’s most prominent space scientists believes humanity may finally get an answer to one of its oldest questions ...

In the many decades of NASA exploration, there has only been one detection that got on that scale. It was collected by the ...

May the faint chemical signals drifting through the atmosphere of a distant world be the long-sought message that we are not alone. Astronomers have reported seeing an unusual and strong combination ...

Scientists searched 27 exoplanets for alien technology using planetary eclipses, revealing a new way SETI hunts signals ...

The unusual specimen raised eyebrows because it appeared capable of causing levitation. An official investigation has not ...

One hundred twenty light-years from us, there is an exoplanet that can potentially host life. It's called K2-18b, and it's the world you'd want to visit. K2-18b isn't exactly like Earth. It's more ...

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