Science

A massive space rock impact may have triggered Earth’s magnetic field

A massive space rock impact may have triggered Earth’s magnetic field

Our planet’s magnetic field is a miracle, not a late bloomer, a new study suggests.

Protective magnetic field surrounding Earth is so strong that it must have formed early in our history, but there is a complication in timing: Earth was probably struck by it mars-the size of a protoplanet 4.5 billion years ago. That drop may be related to the way our magnetic field is formed.





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