These out-of-place artifacts, or OOPArts, are surprising for their place and time — but there's an explanation behind each ...

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 ...

Researchers have uncovered extensive pre-Hispanic settlements hidden beneath the waters and vegetation of Bolivia's Great Tectonic Lakes. Using advanced LiDAR technology and collaborative fieldwork ...

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 ...