"When I look at the night sky and see the work of your fingers-- the moon and the stars you have set in place--what are mortals that you should think of us, mere humans that you should care for us?" (Psalm 8:3-4).
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Most sources claim that the first motorcycle was built by Gottlieb Daimler, an assistant to Nicholaus Otto (who invented the Otto cycle, a kind of engine). In 1885, Daimler added a gasoline motor to a wooden bicycle, replacing the pedals. Daimler's motorbike was propelled by an engine, but it was not the first motor-driven cycle.
Actually, the first motorbike was built seventeen years earlier in 1868. It was not powered by a gasoline engine, but by a steam engine. Its builder was Sylvester Roper. His steam-powered bike did not catch on, but it anticipated many modern motorbike features, including the twisting-handgrip throttle control.
History of the motorcycle: http://www.motorcycle.com/mo/mcmuseum/firstbike.html http://www.uh.edu/engines/epi1286.htm http://www.uh.edu/engines/epi921.htm