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NASA: Mars Once Held Enough Water for Life

NASA scientists say evidence collected by the Mars rover Opportunity provides the best evidence yet that water once flowed on Mars. Rock samples analyzed by Opportunity suggest Mars once held enough water to sustain conditions for life. Hear NPR's Joe Palca.

Copyright 2022 NPR. To see more, visit https://www.npr.org.

Joe Palca is a science correspondent for NPR. Since joining NPR in 1992, Palca has covered a range of science topics — everything from biomedical research to astronomy. He is currently focused on the eponymous series, "Joe's Big Idea." Stories in the series explore the minds and motivations of scientists and inventors. Palca is also the founder of NPR Scicommers – A science communication collective.
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