"Quartz" crystals at the Earth's core power its magnetic field https://t.co/79kykOyNlZ https://t.co/HWR6SxWAoc
— iPhoneMaster13 (@iPhoneMaster13) February 24, 2017
from Twitter https://twitter.com/iPhoneMaster13
February 23, 2017 at 10:54PM
via IFTTT
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