Guests: John Batchelor, Chris Carberry of Explore Mars, Dr. David Livingston.  Topics:  The Chris Carberry new book "Alcohol in Space," known alcohol usage in space, 2020 Mars missions.  You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog. Comments, questions, and any discussion must be relevant and applicable to Space Show programming. Written Transcripts of Space Show programs are not permitted without prior written consent from The Space Show (even if for personal use) & are a violation of the Space Show copyright.