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 ...

How could the principle of "radical mundanity" proposed by the Fermi paradox help explain why humans haven't found evidence of extraterrestrial technological civilizations (ETCs)? This is what a ...

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 ...