Neil deGrasse Tyson @neiltyson
A link between Matter & Energy that may have eluded Einstein himself. Weekly image & link to a T-shirt. Conceived & designed by fans. Approved by me. After fees to the artist, proceeds go to educational organizations. https://t.co/sEjuOUY6sz https://t.co/Syl25kDvuP — PolitiTweet.org