Tags Barry DiGregorio astrobiology Mars planetary protection Dr. Gil Levin Viking Labeled Release experiments life detection on Mars Mars Sample Return Mars contamination quarantine off Earth research lab Marian poles SpaceX Mars plans Mars human spaceflight timeline Apollo 11 protection solar wind Mars life support Mars life detection conspiracy thoughts Mars true color red planet origins Hubble Space Telescope Images Viking images Don Davis Pancam Mars Curiosity Mars gray scale Martian atmosphere color Mars dust NASA Planetary Protection Office United Nations Dr. Pat Straat ICAMSR Guest Barry DiGregorio Tagline Mars and so much more View the discussion thread.