NASA Jet Propulsion Lab scientists Armin Kleinboehl and Marek Slipski lead a new project that is recruiting thousands of citizen explorers. They explain to host Mat Kaplan how this massive effort may help us finally understand how the once plentiful Martian surface water disappeared. Then we look back to the dawn of science as Bruce Betts closes out our latest What’s Up space trivia contest. And there’s a meteor shower around the corner! There’s more to discover at https://www.planetary.org/planetary-radio/2022-cloudspotting-on-mars
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