Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

Before his death, Stephen Hawking consistently warned humanity against contacting aliens. As interest in UFOs and little ...

Scientists have long known that ancient Homo sapiens and Neanderthals lived alongside each other for thousands of years—until ...

Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...

You are driving alone through a quiet countryside road at dusk when something strange appears in the sky. A sudden white ...