Our search for extraterrestrial life has turned up empty, perhaps because technologically advanced civilizations are doomed ...

Sohrab Rahvar and Shahin Rouhani’s recent paper, “Constraining the Lifespan of Intelligent Technological Civilization in the Galaxy,” lays it out bluntly: Advanced civilizations last roughly 5,000 ...

Across deserts, jungles, and polar ice, new discoveries are quietly stretching the story of civilization further back in time than many of us learned in school. As archaeologists debate mysterious ...