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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? 

Neil deGrasse Tyson: Jason Gots: It’s a little hard to wrap your mind  around the very fabric of the universe expanding.   Neil deGrasse Tyson: Yeah. That’s why we have math.  Because our brains evolved to not get eaten in the  plains of Africa. Really good to check if there’s a lion  in the brush. But it’s not equipped for thinking about  the expanding space-time continuum.  But math is very logically constructed.  So when you manipulate the math,  it’s tantamount to manipulating  your understanding of the universe. 

Surprise conversation starter interview clips:

Lawrence Krauss on Optimism, Dean Buonomano on "Presentism" and "Eternalism"

About Think Again - A Big Think Podcast: You've got 10 minutes with Einstein. What do you talk about? Black holes? Time travel? Why not gambling? The Art of War? Contemporary parenting? Some of the best conversations happen when we're pushed outside of our comfort zones. Each week on Think Again, we surprise smart people you may have heard of with short clips from Big Think's interview archives on every imaginable subject. These conversations could, and do, go anywhere.