This geophysicist uses rock-sniffing subs to understand polar magnetic flips https://t.co/QwWxPoNYPE http://pic.twitter.com/CK4IXW0ksp
— Popular Science (@PopSci) December 26, 2016
via Twitter https://twitter.com/PopSci
December 27, 2016 at 12:30AM
This geophysicist uses rock-sniffing subs to understand polar magnetic flips https://t.co/QwWxPoNYPE http://pic.twitter.com/CK4IXW0ksp
— Popular Science (@PopSci) December 26, 2016
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