Karl Gawell

Aug. 15, 2008

Geothermal Energy

As part of our ongoing series on alternative energy sources, we'll take a look at methods to harvest energy from the heat beneath the surface of the Earth.

energy, geothermal, heat pump, drilling

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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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