Steven Weinberg

Apr. 03, 2009

Big Questions in Cosmology

In this hour, we'll get an update on the very small--particle physics--and the very large--cosmology--and find out how these two fields of study fit together.

cosmology, physics, origins, arizona

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Michael Pollan Talks Plants and Food

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Baby, It's Cold Outside

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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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