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.

Wondering whether we're alone in the cosmos is almost a rite of passage for human existence. It's a mystery that scientists – and stargazers – have pondered for many years. The Fermi Paradox poses a ...

Are we alone? No. Should we be? Yes, until we smarten up and act like intelligent beings and stop setting our planet on fire.

Humans have created countless inventions that shape our lives in amazing ways. Some are practical, some are revolutionary, and some are simply fascinating. But if aliens suddenly appeared, which ...

Searching for alien languages sheds light on how much human languages have in common—with each other and even with animal communication.