Conversation so far:
how many episodes are there of one strange rock
There are 10 episodes of One Strange Rock.
what is One Strange Rock about
One Strange Rock tells the story of how life survives and thrives on planet Earth, as told by eight astronauts from their unique perspective of being away from Earth
what astronauts are on one strange rock
One Strange Rock features contributions from astronauts Chris Hadfield, Nicole Stott, Jeffrey A. Hoffman, Mae Jemison, Leland Melvin, Mike Massimino, Jerry Linenger, and Peggy Whitson

Question: who hosts the show
Self-contained rewrite: who hosts one strange rock