
Neil deGrasse Tyson @neiltyson
Chapter: LIFE & DEATH "An epitaph worthy of a tombstone comes from the nineteenth century educator Horace Mann: 'I beseech you to treasure up in your hearts these my parting words. Be ashamed to die until you have won some victory for humanity.' " https://t.co/hMOhOcF50a — PolitiTweet.org