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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Cephalopod Spectacular

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Mystery Box

Teaching Ancient Nautilus New Tricks

\tWith its heavy outer shell, weak vision, and primitive brain, the nautilus lacks much of the excitement of the more flashy and cunning cephalopods. Yet a series of experiments by evolutionary biologists Dr. Jennifer Basil and Robyn Crook involving fish juice, blue lights, and mazes dispels the notion that this ancient species is incapable of basic learning and throws into question the origins of cephalopods' intellectual prowess.

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