What if you found out that you had a long-lost relative? And what if that long-lost relative was from a different planet in our galaxy? And what if this faraway planet was home to billions of humans, ...

Elon Musk has turned a long-running joke about being an extraterrestrial into a central part of his public persona, even as he argues that humanity may be the only intelligent life in the universe.

When Neil deGrasse Tyson was 9 years old, he visited the Hayden Planetarium for the first time. Growing up gazing into light pollution in the Bronx, he had no idea there were that many stars. “I was ...

When I look at the night sky, I don’t wonder whether alien life is somewhere out there; I think it probably is. Considering the sheer number of stars in the cosmos, and the possibly larger number of ...

There’s no data to suggest that aliens exist. However, if we believed they existed and came to Earth, our planet would offer ...

By studying Earth's toughest microbes and complex animal "speech", scientists are reshaping how we search for – and may someday talk to – alien life.