Aug. 05, 2011
Scientists Spot Signs of Salty Water on Mars
Are temporary streaks on Martian hillsides a sign of salty water?
Sep. 19, 2008
Mars
In this segment, we'll get the big picture on science on the planet Mars. From orbiting observatories to roving rovers to the ditch-digging Phoenix -- what have planetary scientists learned about Mars, and what remains to be discovered?
Sep. 21, 2007
Mars Update
We get an update on the latest results from orbiting observations of Mars.
AVAILABLE IN ITUNES
Michael Pollan Talks Plants and Food
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Ira Asks: How Do They Make Eyeglasses?
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