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Liquid Water

In the search for extraterrestrial life, MIT scientists say a planet’s carbon-lite atmosphere, relative to its neighbors, could be a sure and detectable signal of habitability. Credits:Image: Christine Daniloff, MIT; iStock

A carbon-lite atmosphere could be a sign of water and life on other terrestrial planets

Image of the Terra Sirenum and its gullies captured by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter.

Gullies on Mars could have been formed by recent periods of liquid meltwater

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