I recommend listening to the StarTalk podcasts if you want some great (and fun) discussion with astronauts, physicists, and comedians regarding space travel and what it takes to get to Mars. Neil DeGrasse Tyson is a great host and has been doing this show for many years. He's also the host of the renewed Cosmos tv series.
I listened to one this weekend while doing lawn work. He and his hosts (including Mike Mannino, astronaut) were discussing some fun stuff. Apparently, astronauts have experimented with low-gravity propulsion by farting, sex in space, and crapping in space (seriously - they train extensively for this, with a toilet that has a camera inside so they can see how they're doing). Of course, all the cool science stuff is there too.
There were two "Packing for Mars" episodes last year.