Guest: Open Lines with Dr. David Livingston. Topics: Bone loss issues, Droid podcast suggestions, bisphosphonates in space, reusability, flyback boosters. You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, http://thespaceshow.wordpress.com. Comments, questions, and any discussion must be relevant and applicable to Space Show programming.

Guest: Dr. Alan Stern; Open Lines. Topics: The upcoming Next-Generation Suborbital Research Conference starting Feb. 28, 2011 in Orlando for the first hour, then Open Lines for the last 45 minutes. Please note that you are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, http://thespaceshow.wordpress.com. Comments, questions, and any discussion must be relevant and applicable to Space Show programming. During the first hour of the program, Dr.

Guest: Dr. Chris Impey. Topics: Astronomy, how the sun and the universe end and issues to consider before that happens. We welcomed Dr. Chris Impey of the University of Arizona Dept. of Astronomy to the show to discuss his new book, "How It Ends: From You To The Universe." You can order this book from the OGLF website and Amazon will make a contribution to The Space Show/OGLF. Please use the URL www.amazon.com/dp/0393069850?tag=onegialeafou-20.

Guest: Brian Enke. Topics: Mars, space policy, self publishing, life sciences, science fiction, asteroids. Brian Enke returned to the show to discuss Mars and space science/policy related issues, plus his science fiction writing and work in the self publishing field in this two hour program in two segments. In our first segment, I asked him when he thought humans would set foot on Mars. Brian's response was certainly measured and concerned.