Martian soil toxicity

Guest: Peter Smith. Topics: The search for life on Mars and Mars science missions. Please note that you are invited to comment, ask questions, and rate this program on the new Space Show blog, http://thespaceshow.wordpress.com. We welcomed to the show Dr. Peter Smith from the Lunar and Planetary Lab at the University of Arizona in Tucson. Dr. Smith was with us for one full hour, then we took a short break and returned for a few minutes in which I outlined future Space Show programming. Our discussion with Dr.