A polar bear killer, a Sputnik-inspired scientist, a man who uses the past to see the future and seismologist Lucy Jones. What do they all have in common? Without them, we wouldn’t understand the what, when, why and how of the big one. Hosted by Jacob Margolis. Written and reported by Jacob Margolis and Arwen Nicks.Edited by Megan Garvey.Produced by Misha Euceph. Sound designed by Arwen Nicks. Music by Andy Clausen. Engineering by Shawn Corey Campbell and Valentino Rivera. Production and reporting help from James Kim and Mary Knauf.