The strongest hints yet that Mars once hosted living microbes are no longer theoretical models or ambiguous chemistry. They are etched into a single, oddly speckled rock in an ancient riverbed, where ...

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

NASA's plans for Mars sample return are effectively cancelled as part of a bill approved by the U.S. Congress, ending efforts to collect Perseverance rover samples that could contain evidence of alien ...

A rock sample collected by the Mars Perseverance rover could help answer the question of "whether Mars was home to ...

A mudstone sample from Jezero Crater shows textures and minerals that on Earth often form through microbial activity. Scientists caution that nonbiological processes could also explain the features, ...

Mars is no longer just a story about a single lost ocean or one fleeting window for biology. Taken together, recent rover results and orbital studies now point to a planet that may have been welcoming ...

The Perseverance rover's discovery of a potential biosignature found on a sedimentary rock on Mars is an exciting development in our search for life elsewhere in the universe, but how does it rank ...

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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 ...