How the world’s first metro system was built – Christian Wolmar

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It was the dawn of 1863, and London’s not-yet-opened subway system — the first of its kind in the world — had the city in an uproar. Most people thought the project, which cost more than 100 million dollars in today’s money, would never work. So how did they do it? Christian Wolmar explains how the London Underground was built at a time when no one had built a railway under a city before.

Lesson by Christian Wolmar, TED-Ed 製作的動畫.

非常感謝我們的顧客對我們的支持! 沒有你，這個視頻是不可能的! 美麗的雅浦島, 沙瓦汗, 伊麗莎白·克魯茲, 羅漢古普塔, 莎拉·倫德加德, 麥可·布勞恩-博戈斯, Yujing Jiang, Aubrie Groesbeck, Kathryn J Hammond, sammie goh, Delene McCoy, Mayank Kaul, Ruth Fang, Scott Gass, Mary Sawyer, 傑森·薩斯洛, Joanne Luce, Rishi Pasham, Bruno Pinho, and Javier Aldavaz.