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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Snowflake Safari

\tWinter weather means more than sledding and snowmen. Next snowstorm, grab a magnifying glass and try snowflake hunting. Bullet rosettes, stellar plates, and capped columns are just a few of the varieties of snow crystal you can find in your backyard. Kenneth Libbrecht, physicist at Caltech and snowflake expert, shares secrets of the snowflake.

\tVideo originally published on ScienceFriday.com on December 31, 2009

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