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<p>I always thought the question should be what if steam engines had been realized much sooner.  Most people don't know that the ancient Greeks had a basic steam engine but used it as a toy for amusement and never realized it's mechanical potential.  It was a hollow metal ball suspended over a flame with two pipes sticking out on either end.  You put water in the ball, the flame heated the water, and steam would come out the two pipes causing the ball to spin round and round.  They never figured out to attach it to gears, etc, for mechanical work.</p><p>What would the world be like today if the steam engine had been invented thousands of years before it was?  It could've been possible.</p>
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