Louis Friedman

Nov. 13, 2009

Solar Sail Spacecraft

The Planetary Society plans to power a spacecraft using the pressure of sunlight reflecting off huge solar sails.

spaceflight, solar sail, sagan, lightsail

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Michael Pollan Talks Plants and Food

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Oliver Sacks: Hallucinations

In his latest book, neurologist Oliver Sacks explores the strange world of hallucinations, and documents his own experiments with psychedelic drugs.

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