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 ...

Warnings that artificial intelligence could end human civilization have shifted from science fiction to serious academic ...

(NewsNation) — Astronomers and other scientists have concluded that, with so many stars in the universe, there must be planets around some of those stars that support carbon-based life. And some of ...

Are there advanced alien “supercivilizations” lurking in our galaxy? If there are, they may use massive megastructures, such as a “Dyson sphere,” to harvest solar energy directly from a star. As first ...