Neil deGrasse Tyson

@neiltyson ↗

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Last Checked Nov. 17, 2022

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Thu Mar 17 14:45:00 +0000 2022

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Neil deGrasse Tyson @neiltyson

If human blood used Copper instead of Iron, turning it Green, I wonder what color we would have made stop lights & stop signs. https://t.co/hH5c86MNG2 — PolitiTweet.org

Posted March 17, 2022

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Neil deGrasse Tyson @neiltyson

Lobsters (and Vulcans) use copper instead of iron in their blood. Oxidized copper confers a Green tinge. https://t.co/lEuczvnluw — PolitiTweet.org

Posted March 17, 2022

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Neil deGrasse Tyson @neiltyson

A reminder that Kryptonite, the only substance in the universe that can injure or kill Superman, is Green. https://t.co/20l6op0lhN — PolitiTweet.org

Posted March 17, 2022