Is Elmo a Time Traveler? We Talked to Physicists to Find Out
Elmo celebrated his birthday earlier this month. The beloved children’s entertainer made his first appearance on Sesame Street in 1980, so it seems like a fair guess that he would have turned at least 44 years old this year. By any normal measure, Elmo should be a middle-aged man, but lurking in the details of his back story is a fact so bizarre that it strains our most basic assumptions about the universe. Elmo is three and a half years old—and every year, on February 3rd, he turns three and a half again.Why Bitcoin…