The sun offers an amazing source of power, putting out 3.8 x 1026 watts. At its upper atmosphere, the Earth takes in about 174 petawatts of solar radiation, reflecting about 30% back out into space. Humans have been trying to harness this energy into a usable source of power since ancient times. Check out the interesting history of solar energy below in this infographic.
![The History of Solar Energy [INFOGRAPHIC]](http://solartechonline.com/wp-content/uploads/1410_graphic-solartech-solar-power-history.jpg)
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