Ancient rocks reveal how earth avoided Mars-like fate - MINING.COM - MINING.com

The development of earth’s solid inner core had everything to do with the rejuvenation of the swirling liquid iron in the planet’s outer core, which generates its protective magnetic field, something that Mars doesn’t have.

In a paper published in the journal Nature Communications, the Rochester scientists explain that about 565 million years ago, the magnetic fields strength decreased to 10% of its strength today. Then… [+3940 chars]

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