Michael A'Hearn

Nov. 12, 2010

A Trip To A Comet

Last week, a NASA mission paid a visit to comet Hartley 2, flying by at a distance of just a few hundred miles. We'll talk about what they learned.

comet mission epoxi nasa space

Jan. 29, 2010

Tracking Near-Earth Objects

The US spends $4 million each year to search for comets or asteroids that could threaten the planet. That's not enough to get the job done, according to a new report from the National Research Council.

neo, asteroid, comet, meteor, collision, rock, space, deep impact, bruce willis

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Michael Pollan Talks Plants and Food

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Myths and Tips on Keeping Your Cool This Summer

Think caffeine dehydrates you? Or that you can't get too much water on a hot day? Douglas Casa, of the Korey Stringer Institute, sets the record straight.

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