Breaking news and analysis from time.com. Politics, world news, photos, video, tech reviews, health, science, and ...

Hundreds of thousands of dark streaks are crawling down Martian hillsides, vanishing, and reappearing with the seasons. Two ...

People vary in how choosy they are when it comes to picking a partner. The most attractive potential partners are a scarce ...

When humans are moving as a crowd, their movements tend to be highly coordinated, similarly to the collective motions of bird ...

The Trump administration’s moves on marijuana and psychedelics signal the start of a new era in Republican drug policy. The ...