There's more evidence that early Earth collided head-on with another planet https://t.co/pjvjgUku9x http://pic.twitter.com/ULhoX9xwy9
— Popular Science (@PopSci) February 3, 2016
via Twitter https://twitter.com/PopSci
February 04, 2016 at 01:53AM
There's more evidence that early Earth collided head-on with another planet https://t.co/pjvjgUku9x http://pic.twitter.com/ULhoX9xwy9
— Popular Science (@PopSci) February 3, 2016
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