NASACast combines the content of all the NASACast subject area podcasts into a single omnibus podcast. Here you'll find the latest news and features on NASA's missions as well as the popular "This Week @NASA" newsreel.
http://www.nasa.gov/
The Challenges for Astronauts on the Journey to Mars
NASA’s Human Research Program (HRP) outlines some of the major challenges facing our astronauts for the journey to Mars.