Earth's protective sky is at least 3.7 billion years old | Science

A group of scientists finds the oldest signal of the planet’s magnetic field in the the Isua Greenstone Belt in Greenland

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South Africa ,Misua ,Kommune Kujalleq ,Greenland ,United Kingdom ,Australia ,British ,Claire Nichols ,Earth Sciences ,University Of Oxford ,Journal Of Geophysical Research ,Isua Greenstone ,Geophysical Research ,Great Oxidation Event ,