Thanks, Thought Bubble. So that's a pretty good looking empire, and sure, a lot of it was pasture or mountains or desert, but the Mongols did conquer a lot of people too. And in some ways, with Genghis's death, the empire was just getting started. His son, Ogedai Khan, expanded the empire even more. And Genghis's grandson, Mongke, was the Great Khan in 1258 when Baghdad, the capital of the Abbasid Empire, fell to the Mongols. And another of Genghis's grandsons, Kublai Khan, conquered the Song Dynasty in China in 1279. And if the Mamluks hadn't stopped another of Genghis's grandsons at the Battle of Ain Jalut, they probably would have taken all of North Africa.