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What are Those Things on Airplanes’ Wings?

10/01/2018 by admin

Categories Science Tags airline, airplane, drag, engineer, engineering, fuel, Green, Hank, Physics, saving money, Science, SciShow, Vortex, vortices, winglets, wings

Humans and Energy: Crash Course World History 207

15/08/2017 by admin

Categories History, Learn Tags alfred crosby, coal, Energy, fuel, Human, Humanity, John Green, labor, nuclear, petrole..., Power, pyramids, solar, Solar energy, stan muller, three mile island

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