In which Stan Muller subs for John Green and teaches you about energy and humanity. Today we discuss the ideas put forth by Alfred Crosby in his book, Children of the Sun. Historically, almost all of the energy that humans use has been directly or indirectly generated by the sun, whether that be food energy from plants, wind energy, direct solar energy, or fossil fuels. Stan looks into these different sources, and talks about how humanity will continue to use energy in the future as populations grow and energy resources become more scarce. You can directly support Crash Course at www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing this content. SUBBABLE SPONSOR MESSAGES! TO: Dana FROM: Cameron you're wonderful, I can't wait for our faces to meet :) TO: TheGeekyBlonde FROM: Arbace Thanks for your outstanding Youtube Abuse Recovery video! youtu.be/3Uc5eNNG60o You can get Alfred Crosby's Children of the Sun here: smile.amazon.com/Children-Sun-Humanitys-Unappeasable-Appetite/dp/0393931536/ref=sr_1_1?ie=UTF8&qid=1409260623&sr=8-1&keywords=crosby+children+of+the+sun

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