Yay! Happy birthday to Genghis Khan's descendants. How do I know it's your birthday, Genghis Khan's descendants? Because every day is your birthday. Because right now, on the planet Earth, there are 16 million direct descendants of Genghis Khan, meaning that every day is the birthday of 43,000 of them. So good news, Genghis Khan, your empire might be gone, but your progeny lives on and on and on and on. Happy birthday!