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Neil deGrasse Tyson @neiltyson
@skyglowberlin Thanks for sharing your concerns. James Joyce rhymed quark with mark, and that's the actual word origin of the particle name. As for the Kelvin claim, that's clearly misstated. Thanks for catching it. Will correct in the next printing. FYI: The book's target age is 8-12. — PolitiTweet.org