At its peak, the ancient Indus River Valley civilization featured gridded streets, multistory brick homes, flush toilets and bustling shops. Its people traded gold, precious stones and items such as ...

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 ...

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 ...

For decades, scientists engaged in the Search for Extraterrestrial Intelligence (SETI) have probed the galaxy for signs of artificial radio transmissions. Beginning with Project Ozma in 1960, ...