‘Halos’ on Mars Suggest Conditions for Life Lasted Longer Than Thought

Shortly after touching down inside the Red Planet’s 96-mile-wide (154 kilometers) Gale Crater in August 2012, NASA’s Curiosity rover found evidence that the area had harbored a potentially habitable lake-and-stream system in the ancient past.

The new study bolsters other Curiosity results announced in December, which suggest that, long ago, Gale may have been able to support microbial life for hundreds of millions of years consecutively.

The silica halos — which Curiosity studied with its cameras, X-ray spectrometer and laser-firing Chemistry and Camera instrument — lie on the lower north slope of Mount Sharp, a 3.4-mile-high (5.5 km) mountain that rises out of Gale Crater’s center.

Read more on https://www.space.com/37025-mars-lake-halos-conditions-for-life.html

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