John Callas

Dec. 04, 2009

Free The Rover

NASA scientists are still trying to free the Spirit rover, which has been stuck in Martian soil since April.

mars, rover, spirit, nasa

Apr. 24, 2009

Checking In With the Mars Rovers

Mission managers are investigating unexplained reboots and 'amnesia events' on board the Mars rover Spirit. We'll get an update on the rovers' status.

mars, rovers, spirit, computer, robot

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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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