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Watch Modern Marvels Season 21 Episode 3 online. Maybe available on Youtube, Netflix, PrimeVideo, Hulu, Disney and other legal streaming platforms.

To see how people, products, and more move around America, Adam Richman explores how a legendary long-hauler meticulously custom-builds each truck at Daimler. Then, flying cars may finally be a reality, but will helicopters that cost the same as pick-up trucks carry the day? And find out how we might be zipping around the country in tubes! Plus, see how the iconic Union Pacific railroad is preserving the past while chugging into the future.