Following the money
2010; IOP Publishing; Volume: 23; Issue: 02 Linguagem: Inglês
10.1088/2058-7058/23/02/37
ISSN2058-7058
Autores ResumoIn 1271 a 17-year-old boy called Marco Polo embarked on an adventure that took him from his hometown of Venice, across Europe, the Middle East and Asia, all the way to Beijing. He returned home 24 years later, having travelled over 24 000 km. A trip of this magnitude was unprecedented in Polo's time; almost 750 years later, he is rightly remembered for it. But what was an exception in medieval Italy is today an everyday occurrence: our 21st-century world is on the move. Every year, more than three billion passengers use the international air-transportation network, flying on a complex web of routes that connects more than 3000 airports worldwide. This global connectivity has made it possible for people to go from virtually any place on the planet to any other within a matter of days.
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