Alan Weisman

Oct. 04, 2013

‘Countdown’ Explores the Effects of Our Overpopulated Planet

How can we sustain and balance the exploding global population?

alan weisman, countdown, human population, overpopulation, growth

Nov. 23, 2007

The World Without Us

What would the world be like if humans were to disappear from the planet?

life, extinction, ecology

Sep. 07, 2007

The World Without Us

Ira talks with author Alan Weisman about what the world might be like if humans were suddenly to disappear from the planet.

end, destruction, catastrophe

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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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