Mars is a place of mysteries. Was it ever—or is it now—home to life? Why did it lose its magnetic field, allowing the solar wind to claw away its once-abundant atmosphere? And then there’s the riddle of the lost Martian water. As dry riverbeds, deltas, and ocean basins attest, the Red Planet once fairly sloshed with water—until three billion years ago, when it began turning into the desert world it is today.

Topics:  red planet   sept   national academy   sciences   mars insight   science advances   nasa   space telescope   john clarke   boston   university&rsquo   space physics    ldquo;in   modern-day mars   earth&mdash   running    ldquo;there   at   insight   mars   in   hubble   earth   maven   martian   clarke   mars&rsquo   hydrogen   million   escape   years   deuterium   sun   study   types   light   miles   nucleus   orbit   loss   billion   times   understand   ocean   ground   relied   average   lost   dry   solar   aphelion   work   oxygen   true   closest   published   perihelion   molecules   energy   proton   approach   amount   
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