DIRECT MESSAGES
Did the Incan Empire have a system of ultra-marathon running messengers? At its greatest extent, the Incan Empire stretched down almost the entire west coast of Latin America, further than the distance from New York to San Francisco. Despite that vast size, however, the entire empire endured for less than a century, collapsing during the Spanish conquest of the Americas in 1533. The last bastions of the Incan resistance finally disappeared in the 1570s. Famously (and perhaps