Evolution of Baldness: Why Humans Lose Their Hair

Why do humans go bald? And why would evolution let something as obvious as hair loss survive for so long? In this video, we break down what actually causes the most common form of hair loss: hair follicles that become more sensitive to the hormone DHT and slowly shrink over time. Then we look at the bigger question: why natural selection never removed it. We cover late-onset traits, genetics, hormones, why we kept thick scalp hair while losing body hair, and the popular theories (age signals, social status, sexual selection) and how weak the evidence for them is. The honest answer is stranger than "evolution wanted it" or "you're just getting old." CHAPTERS 0:00 Why do humans go bald? 0:24 DHT and shrinking hair follicles 0:55 Why didn't evolution remove baldness? 1:47 Genetics, hormones, and uneven hair loss 2:21 Is baldness just a side effect? 2:36 Theories: age, maturity, and status 3:16 Why humans kept scalp hair 3:55 Why some people still lose it 5:05 What we know vs. what we don't 5:29 Evolution doesn't care about appearances 6:33 So why are you going bald? 7:30 The big question If you enjoyed this, subscribe for more simple, illustrated explainers on how the human body and evolution really work. #baldness #evolution #hairloss #science #humanbody