James Noonan

Sep. 12, 2008

Genes -- And How Humans Got Their Dexterity

We use our hands to play flamenco guitar, crochet a sweater and grip a baseball bat...but how did we get such great dexterity? In this segment of Science Friday, guest host Joe Palca takes a look at how humans came up with such a great hand.

hand, opposable thumbs, limb development

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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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