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

https://ed.ted.com/lessons/how-the-world-s-first-subway-system-was-built-christian-wolmar

in 1863 30,000 brave Londoners went underground and travelled four miles under London. It was the idea of Charles Pearson. Remind you of anyone in the modern era? Great lesson. Now I know why the tube is called the tube!

in 1863 30,000 brave Londoners went underground and travelled four miles under London. It was the idea of Charles Pearson. Remind you of anyone in the modern era? Great lesson. Now I know why the tube is called the tube!