CAPE CANAVERAL, Florida — Mars may be drenched beneath its surface, with enough water hiding in the cracks of underground rocks to form a global ocean, a new study suggests.

The findings, published in the Proceedings of the National Academy of Sciences on Monday, are based on seismic measurements from the National Aeronautics and Space Administration's Mars InSight lander, which detected more than 1,300 marsquakes before shutting down two years ago.

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