the.com/metro

a city's bloodstream, hurtling strangers underground while pretending the silence is normal

means A city's underground or rapid-transit rail system — or, loosely, the dense urban region it serves.

from Short for "metropolitan," itself from the Greek metropolis — mētēr ("mother") plus polis ("city"), literally the "mother city" that founded colonies. The clipped form took off with the Paris underground, the Chemin de Fer Métropolitain, opened around 1900 and quickly nicknamed le métro; the word then rode the rails into cities worldwide.

deepest station
Kyiv's Arsenalna sits 105 meters underground
oldest line
London's opened in 1863, steam-powered and choking
busiest system
Tokyo moves billions of riders yearly
bomb shelters
Moscow's deep stations doubled as wartime refuges
rat ecology
underground rats evolve distinct populations per station
for instance

tokyo metro — world's busiest rapid transit system, 3.7 billion annual passengers

paris metro — opened 1900, 302 stations covering 16 lines in france's capital

new york city subway — oldest continuous rapid transit system, opened 1904 with 472 stations

london underground — world's first underground railway, opened 1863 in england

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