It’s a real space oddity. Former Pentagon UFO investigator Luis Elizondo claims the US government possesses unreleased ...

The best way to find alien technosignatures is to look for ones that have long survived their creators, according to a new ...

Alien civilizations may have left traces. We just may not have been looking in the right place.

A new line of research proposes that the first clear signs of extraterrestrial intelligence may not come from distant stars, ...

Scientists have identified new clues that could help astronomers spot one of the most famous hypothetical alien ...

Researchers have looked at how particular microbes from Earth would fare in conditions like those of Mars, the moon, and the ...

Our search for technosignatures—clear signs of advanced civilizations beyond Earth—takes many forms. Many are driven by the famous Drake equation, which attempts to estimate how many technological ...

A Soviet astronomer in the 1960s proposed a scale to classify hypothetical alien civilizations. Here’s why the framework is ...

Investigating an area of interesting light rock seen from orbit, Curiosity found some particularly weird-looking structures.

Add Yahoo as a preferred source to see more of our stories on Google. A colossal mass buried beneath the Moon's far side may be the remains of an ancient impactor. (CREDIT: NASA/GSFC/Arizona State ...

The Moon’s biggest scar may be hiding something even stranger than the impact that made it. Deep beneath the South Pole-Aitken basin on the lunar far side, scientists have identified a huge mass of ...