Eight hundred years ago, a letter could travel across Asia faster than at any time in history. ✨🎤The Mongol Empire built a system called the ortoo — a network of relay stations. ✨🎤Stations stood about thirty kilometers apart along every major road. ✨🎤

A rider would gallop at full speed to the next station. ✨🎤There, a fresh horse and sometimes a fresh rider were always ready. ✨🎤Important messages could travel more than two hundred kilometers in a single day. ✨🎤Riders carried a metal tablet called a paiza, which ordered every station to help them. ✨🎤

Marco Polo saw this system and described it with amazement. ✨🎤Historians say no mail system matched this speed until the invention of the train. ✨🎤The idea was simple but brilliant: never let the message rest, only the horses. ✨🎤