Guest: Emily Lakdawalla. Topics: The Planetary Society, space geology, robotic & science missions, science mission budget. Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, http://thespaceshow.wordpress.com. Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use.

Guest: Gus Frederick was our guest for this Space Show program in order to discuss Martian caves and lava tubes with us. You can follow along in the discussion with these two websites and the instructions provided by Gus: 1) The Caves of Mars located at http://www.highmars.org. 2) Caves of Mars Illustrations located at http://www.highmars.org/marscave. Gus provided other URLs during the show and you will want to see the pictures and graphics he discusses.