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

Investigating an area of interesting light rock seen from orbit, Curiosity found some particularly weird-looking structures.

This consciousness begins in Israel and radiates outward. It demands sweat, blood, tears of sorrow and tears of joy. The arena of our mission is not Mars, but the broken places of Earth: Africa, Asia ...

Every Fourth of July, there's one movie that I almost always end up watching, and that's Independence Day . I still remember ...

A siphonophore—a colonial marine invertebrate related to the venomous stinging Portuguese Man-o-war—is scanned using Deep ...

From "Independence Day" to "Invasion of the Body Snatchers", movies and TV shows are packed with advice for anyone aspiring ...

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

The organic molecules could come from life or from ordinary chemistry — only samples returned to Earth can settle it.

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A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow the search for potentially habitable planets beyond Earth.

Attention human. You are receiving an interstellar radio transmission. And it could be coming from one of the nearest ...