Planets that once lived only in pulp novels and movie concept art are now turning up in real data. Astronomers are not just finding distant worlds, they are cataloguing places with molten surfaces, ...

Worlds upon worlds await us in the cosmos and we’re finding more all the time. Before 1992, we weren’t even completely certain planets existed outside of our solar system. Now, astronomers are finding ...

Water may not be essential to support life, and an entirely different type of liquid could do the same in alien worlds, a new study claims. Until now, water has been considered a requirement for life ...

It’s a sweltering Tuesday in Washington, D.C., the kind of day that stretches the definition of Earth as a “habitable” planet. But on an eighth-floor terrace near the U.S. Capitol building, dozens of ...

It's been more than four years now since the United States became the first nation in the world to achieve powered flight on another planet. Responsible for that is a little helicopter-style drone ...