23h 39min, mar 23, 1774 y - Establishment of columbian Exchange
Description:
The Exchange Is a relatively obscure concept, developed by a relatively obscure historian. Most people have never even heard of it. Its definition—the transmission of non-native plants, animals, and diseases from Europe to the Americas, and vice versa, after 1492—doesn't sound very sexyAdded to timeline:
Date:
23h 39min, mar 23, 1774 y
Now
~ 251 years ago