Could the first confirmed signal from an extraterrestrial source be less a hello than a goodbye? Astrophysicist David Kipping argues as much, and his “Eschatian Hypothesis” reimagines the way ...

Nowhere on Earth is more guaranteed to put modern anxieties into perspective than Egypt. Visiting the pyramids of Giza ...

Donald Trump said he would not attend an emergency meeting of the G7 in Paris with Emmanuel Macron. The French president had ...

Legendary sci-fi author Isaac Asimov helped create a TV detective series with a Star Trek writer, but it didn't end up ...

Mars is famous for its volcanoes, canyons and ancient river valleys, but some of its most active geology happens in slow ...