“These philosophically fun ideas usually satisfy nobody. Nonetheless, they remind us that ignorance is the natural state of mind for a research scientist. People who believe they are ignorant of nothing have neither looked for, nor stumbled upon, the boundary between what is known and unknown in the universe.”

American astrophysicist, author, and science communicator

Neil deGrasse Tyson is an American astrophysicist, author, and science communicator. He studied at Harvard University, the University of Texas at Austin, and Columbia University, and has been director of the Hayden Planetarium in New York City since 1996. He was a postdoctoral research associate at Princeton University from 1991 to 1994, then joined the planetarium as a staff scientist and also taught at Princeton as a visiting research scientist and lecturer. At the American Museum of Natural History, he founded the Department of Astrophysics in 1997 and has been a research associate there since 2003.