On this day in 1900, army physician James Carroll deliberately allowed an infected mosquito to feed on him, in order to help prove that mosquitoes were the vectors of yellow fever. He developed a severe case of the disease.
In 1642, during the Thirty Years War, when soldiers attacked a village in Prussia the nuns from the town’s convent overturned the convent’s beehives. The angry bees drove back the attackers. The grateful townsfolk renamed their village Beyenburg (Bee town).