Dr. Neil deGrasse Tyson
There are three kinds of people in the world: those who know math and those who don't.
— Neil deGrasse Tyson (@neiltyson) July 9, 2013
There are three kinds of people in the world: those who know math and those who don't.
— Neil deGrasse Tyson (@neiltyson) July 9, 2013
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