1. Siri was an app that was available on Apple's own App Store until the company decided to buy it in 2010. NurPhoto / NurPhoto via Getty Images Siri was a small startup that had developed a voice ...

2. In 1137, a 14-year-old girl named Eleanor became the "greatest heiress in the known world." She was, in her own right, the Duchess of Aquitaine and ruled it independently through her two marriages.

Horses have been around humans for thousands of years, yet they manage to surprise people who claim to know them. They sometimes exhibit odd quirks and social habits that sound strange for this ...