NASA launched their latest Mars rover into space this morning. More details on Perseverance, its mission, and the origins of its Plutonium battery. Archeologists have confirmed the origin of some of the stones from Stonehenge. A few studies are showing that masks protect the wearer as well as others. Plus, some bathroom-humor tinged mask science. And the startup creating clean water out of thin air for the Navajo Nation.

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Links:

• NASA’s Mars Rover Will Be Powered by US-Made Plutonium (Wired)
• 1940s Poster in Oak Ridge, Tennessee (r/PropagandaPosters)
• Oak Ridge "The Secret City" – Oak Ridge, Tennessee (Atlas Obscura)
• NASA's Perseverance Rover Launched on Mission to Mars (Wall Street Journal)
• NASA’s life-hunting Mars rover is officially on its way to the Red Planet (The Verge)
• We're going to record sound on Mars. It'll be eerie. (Mashable) 
• Archaeologists find the source of Stonehenge sarsen stones (Ars Technica) 
• Scientists solve mystery of the origin of Stonehenge megaliths (Reuters)
• mask-protection.html?smid=tw-share">Does Wearing a Mask Protect Me? Some Evidence Says Yes (NY Times)
• Why You Can Smell a Fart Through a Mask (LifeHacker)
• Do Masks Work Or Not?? Proving Whether Masks Stop Covid-19 Transmission with Uncle Rob (Uncle Rob, YouTube)
• Zero Mass Water brings its water-from-air tech to Navajo Nation (Fast Company)

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