
Neil deGrasse Tyson @neiltyson
Passionate about the number 7, Isaac Newton made sure he ID’ed seven, not six rainbow colors: Red-Orange-Yellow-Green-Blue-Indigo-Violet, the first letters of which conveniently spell a would-be spectral superhero: Roy G. Biv. https://t.co/iiiWFVmiL7 — PolitiTweet.org