The Presidential Daily Brief


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    Snowfall on Mars More Extreme Than Thought

    Winter is coming — every night. Once imagined as a gentle dusting, new research has found that Martian snowfall is more like a blustery ice storm as nighttime temperatures drop precipitously. A recent detailed examination of the clouds on Mars, which hint at how atmospheric dynamics caused the planet to lose much of its water, also discovered how inclement its weather can become. That could chill future plans to visit the Red Planet, where experts say the thinner atmosphere means wind turbulence poses a serious risk for landing missions.

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