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Watch Modern Marvels Season 9 Episode 45 online. Maybe available on Youtube, Netflix, PrimeVideo, Hulu, Disney and other legal streaming platforms.

Modern Marvels: They constitute the very essence of the modern world; the cadence of our progress sounds in the measured ring of the blacksmith's hammer. From soaring skyscrapers and sturdy bridges to jet planes and rockets, metals play a key role. Our journey begins before the Bronze Age and takes us into the shiny future when new metal structures--engineered at a molecular level to be stronger, lighter, and cheaper--shape human progress, as they have since man first thrust copper into a fire and forged a tool.