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Earth’s magnetic field weakens every 200 million years, new study says – ROOM Space Journal
A new study using a special paleomagnetic analysis of ancient lava rocks from Scotland, adds further evidence to the idea that…

An analysis of rock samples from ancient lava flows in Eastern Scotland has provided further evidence that Earths magnetic field weakens in strength approximately every 200 million years; a finding which has implications for life on our planet.
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