Jeffrey Sachs

Apr. 18, 2008

Jeffrey Sachs: Common Wealth

In this segment, Ira talks with Jeffrey Sachs, author of the new book "Common Wealth: Economics for a Crowded Planet."

population, poverty, economics, sachs

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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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