Archaeologists have long known that complex societies can rise, flourish and then disappear so completely that only scattered ruins hint at what was lost. Now a new wave of research is sharpening the ...

What if the pyramids of ancient Egypt were not just tombs?The massive structures built in the desert were actually spaceships from an extraterrestrial civilization, housing cities that have continued ...

SPRINGFIELD, Mo. — Archaeologists from Missouri State University are confirming the existence of a previously unknown ancient civilization hidden deep within the Brazilian Amazon, using advanced ...

Add Yahoo as a preferred source to see more of our stories on Google. Collage of a telescope under a starry sky and a planet in space. Earthlings, brace yourselves: the galaxy may be emptier than your ...

Earthlings, brace yourselves: the galaxy may be emptier than your last Tinder date. According to a new study, any alien civilizations out there? Probably short-lived — and doomed to fail spectacularly ...