AI Tutor
If you were a wealthy Roman citizen two thousand years ago, your favorite luxury was a shimmering fabric called silk.
Yet nobody in Rome knew how to make it—the secret belonged entirely to farmers over four thousand miles away in China.
How did fragile cloth travel across deserts, snowy mountains, and foreign empires to reach Rome?

Not a Single Road

Despite its name, the Silk Road was not one paved highway, but a vast network of interconnected overland dirt tracks and mountain passes.
It stretched across the continent of Eurasia—the combined landmass of Europe and Asia—linking East Asia, Central Asia, India, the Middle East, and the Mediterranean world.
Did a single merchant pack up a camel in China and walk all the way to Rome?

The Relay System

Almost no one traveled the entire route; instead, trade worked like a giant relay race.
Merchants traveled in caravans—large groups of travelers and pack animals moving together for safety against bandits and harsh weather.
A caravan would carry goods to an oasis city like Samarkand or Kashgar, sell them in bustling markets, and return home with new items.