Happy birthday, London Underground

Zachary M. Seward, writing for Quartz:

The London Underground celebrates its 150th birthday today, marking the anniversary of the first trip on the tube, between Paddington and Farringdon. The tube is arguably best known for its iconic map, created by Harry Beck in 1931 and adopted as the official map in 1933. Here’s a look at how the map evolved over time.

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