An unusual sighting in a NASA image has reignited speculation that something extraterrestrial once existed on Mars.

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

Pandora mission is designeed to "provide in-depth study of at least 20 known planets orbiting distant stars," according to ...

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