Alfred McEwen

Aug. 05, 2011

Scientists Spot Signs of Salty Water on Mars

Are temporary streaks on Martian hillsides a sign of salty water?

mars, water, planet, space

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?

mars, planet, planetary exploration

Sep. 21, 2007

Mars Update

We get an update on the latest results from orbiting observations of Mars.

mars, space, water, astrobiology

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Michael Pollan Talks Plants and Food

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