Humans are always fantasizing about the next big thing.
Even in the 1800s, people imagined flying cars, self-driving cars, aerodynamic cars, solar-powered cars and cars that double as boats. Today, more than two centuries later, concept cars and illustrations still fuel our wildest dreams. (We're still holding out hope for a time-traveling DeLorean, though.)
Below, take a look through how those dreams have evolved throughout the years.
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