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 ...

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 ...

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 ...