How Many Children Can One Man Possibly Have?

Moulay Ismail, the "Bloodthirsty" sultan of Morocco, is credited with more than 1,000 children, and Guinness calls him the most prolific father in history. But how many children could one man really have? In this video we go step by step, from human biology to sperm donors, IVF labs and the math of family trees, to find the real limit. It turns out the biggest family in history didn't belong to a king at all. It belonged to an ordinary farmer who lived thousands of years ago, and you are one of his descendants. We look at the science of human reproduction and male fertility, the sperm donor who fathered over 550 children, the donor whose hidden cancer mutation reached nearly 200 kids, the lab techniques that could make every sperm cell a chance at a child, and the Y chromosome shared by 16 million men in Asia and once linked to Genghis Khan. Then comes the mind-bending part: genealogy, the "identical ancestors point", and why every person alive today shares the same family tree. Timestamps: 0:00 - The sultan with 1,000 children 1:45 - Nature's one job 3:12 - The sultan's record: fact or fantasy? 5:28 - Level 1: The human body 8:02 - The shortcut 10:08 - Level 2: The lab 11:51 - Level 3: The mothers 14:04 - Level 4: Heritage 16:48 - The ancestor of everyone alive 18:44 - The wrong man How far back can you trace your own family? Tell me in the comments. Everyone down there is family.