A recently discovered "super Earth" located around 25 light-years from our planet is not as massive as previously thought, ...

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 ...

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

New research suggests that alien radio signals may be transformed by plasma from their home stars — and scientists on Earth ...

Is alien life really out there? For decades, humanity has looked at the night sky and asked the same question. Now, according ...

A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow ...

Experts stress need for transparency while aiming to prevent premature announcements and protect scientists ...

Scientists propose building a lab on the moon to screen Mars and other space samples for alien microbes before they ever ...

Disclosure Day treats extraterrestrial life as a challenge to faith. It’s not.