Where did we all come from? This map tracks our migrations through our DNA. Makes me think. https://t.co/xW64ydnR6f http://pic.twitter.com/UBBEqVSa3w
— Chris Hadfield (@Cmdr_Hadfield) January 5, 2016
via Twitter https://twitter.com/Cmdr_Hadfield
January 05, 2016 at 07:57PM
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