By William J. Broad and Ronen Bergman from NYT Science https://ift.tt/zFKGCv0 via IFTTT
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…
Read more at nsf.gov
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…
Read more at nsf.gov
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