The key to solving the mystery of the Viking results is the discovery of perchlorate on the Martian surface in 2008.

A new paper suggests that BARSOOM may have been alive on the planet, and was killed in the Viking experiments.

That does not mean that the detected alkanes are evidence of life on Mars; the conclusion relies on modeling how radiation ...

Organic molecules found by the Curiosity rover are too common to be explained by any process we know, other than life, according to a new study. That, of course, doesn’t rule out the possibility that ...

It's not nearly as easy as one might think. The post If Scientists Ever Find Strong Evidence of Alien Life, Communicating It ...

A year ago, NASA announced that its Mars rover Curiosity had discovered long-chain organic compounds. Their quantity suggests ...

Scientists may need to broaden their horizons in their search for alien life.

NASA's Perseverance rover, launched in Florida, discovered bleached rocks on Mars, providing new evidence that the planet was ...

The discovery suggests that parts of Mars may once have supported tropical-like climates, complete with heavy, sustained rainfall.

The Curiosity rover is travelling along the lower slopes of Mount Sharp (Mars), a large mountain in the center of Gale Crater ...

A quick start to life on Earth could mean that life could also emerge quickly on other worlds—either Earth-like planets circling other stars, or perhaps even other planets or moons in our own solar ...