Since 2008, Big Think has been sharing big ideas from creative and curious minds. Since 2015, the Think Again podcast has been taking us out of our comfort zone, surprising our guests and Jason Gots, your host, with unexpected conversation starters from Big Think’s interview archives. 100 episodes in, like the universe itself, the show continues to expand and accelerate at speeds that boggle the imagination. Neil DeGrasse Tyson is an astrophysicist and the director of the Hayden Planetarium at the American Museum of Natural History in New York City and the spiritual heir to Carl Sagan in getting us all worked up about the Cosmos. He’s been appointed to special NASA commissions, hosted multiple TV specials and podcasts, and written many excellent books, the latest of which is Astrophysics for People in A Hurry – a succinct, wryly funny book that’s surprisingly informative for its size - it has the informational density of a black hole. In This, Our 100th Episode: Can Neil tell the entire history of the universe in 30 seconds? When is it possible to move faster than the speed of light? Why is "dark matter" a terrible name for dark matter? And what does Neil's esteemed colleague Lawrence Krauss have in common with a pit bull? Surprise conversation starter interview clips: Lawrence Krauss on Optimism, Dean Buonomano on "Presentism" and "Eternalism" Learn more about your ad choices. Visit podcastchoices.com/adchoices