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/
Gravity Assist: Life in the Clouds, with David J. Smith
While more research is needed, Smith and others are fascinated by the possibility that airborne microbes could also be found elsewhere in the solar system, and beyond.