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Steel is one of the strongest materials on earth. It has altered civilisations and changed the course of history. From the soaring skylines in a vast metropolis to dinner tables across the world and razor sharp tools responsible for medical miracles: steel has helped sculpt life as we know it. Come face to face with this alloy's marvellous simplicity and the grand and innovative structures it has given birth to, such as the Brooklyn Bridge and Empire State Building.

Watch the full National Geographic Megastructures Steel movie online at no cost in high-definition (HD) quality. No downloads needed—simply click to play and experience the excitement with English subtitles included for your convenience.