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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No Waffling on the Numbers

Three delicious math games you can play on your waffles to build math fact fluency and geometry skills, from the folks at Bedtime Math.

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