Born #OTD in 1646 , Gottfried Wilhelm Leibniz, mathematician & naturalist who also published on fossil unicorns https://t.co/tOOnj4vxPW http://pic.twitter.com/83eyfOJeV0
— David Bressan (@David_Bressan) June 21, 2017
via Twitter https://twitter.com/David_Bressan
June 21, 2017 at 03:50PM
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