Your Body
Your Skin Does Something Nobody Could Explain for 150 Years
· 7:34
For a hundred and fifty years, science had an answer for goosebumps: a useless leftover from when we had fur. Darwin said it in 1872, the textbooks copied it, and nobody looked again. In 2020, a Harvard lab looked again.
They were wrong. A moving piece of music hijacks that ancient reflex and pays your brain in dopamine, the same reward chemical as food and love (Salimpoor, 2011). And in 2020, a Harvard team found that in mice, the very same nerve that raises a goosebump also switches on the stem cells that grow new hair. The “useless” reflex was quietly doing a second job all along.
This is the strangest thing your skin does — where surviving the cold meets being moved by something beautiful.
Chapters
- 00:00 One reflex, three triggers
- 00:57 The tiny muscle that does it
- 01:33 Darwin's answer: a useless leftover
- 02:19 The trigger that breaks the story: music
- 02:42 Your brain on music (dopamine)
- 03:22 Awe, crowds, and who actually gets chills
- 04:18 Why some people are wired for it
- 05:00 The people who can do it on command
- 05:30 The 2020 twist (in mice): goosebumps grow new fur
- 06:40 Not a glitch. A bridge.
Sources
Every Norbo Explains video is built on real research.
- The muscle behind it: Torkamani et al., 2014 (International Journal of Trichology)
- The "useless leftover" idea: Darwin, 1872, The Expression of the Emotions in Man and Animals
- Music, chills and dopamine: Salimpoor et al., 2011 (Nature Neuroscience)
- The stem-cell twist, in mice: Shwartz, Hsu et al., 2020 (Cell)
- Who gets chills: Colver & El-Alayli, 2016 (Psychology of Music) and Sachs et al., 2016 (SCAN)
- Goosebumps on command: Heathers, 2018 (PeerJ)
Questions people ask
Why do we get goosebumps?
A tiny muscle at each hair follicle — the arrector pili — pulls the hair upright. For 150 years the textbook answer was 'a useless leftover from when we had fur,' straight from Darwin in 1872. The full story turned out to be stranger.
Why does music give people chills?
Moving music hijacks that ancient reflex and pays the brain in dopamine — the same reward chemical as food and love. Salimpoor and colleagues showed this in Nature Neuroscience in 2011.
Are goosebumps actually useless?
Apparently not: a 2020 Harvard study found that in mice, the very same nerve that raises a goosebump also switches on the stem cells that grow new hair. The 'useless' reflex was quietly doing a second job.
