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Alarmed by Climate Change, Astronomers Train Their Sights on Earth

By Katrina Miller and Delger Erdenesanaa from NYT Science https://ift.tt/DVdbH1Y via IFTTT
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How did Earth avoid a Mars-like fate? Ancient rocks hold clues

How did Earth avoid a Mars-like fate? Ancient rocks hold clues
Approximately 1,800 miles beneath our feet, swirling liquid iron in the Earth's outer core generates the planet's protective magnetic field. The magnetic field is invisible but is vital for life on Earth's surface because it shields the planet from…

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