What causes goosebumps? | A Sketchbook Explainer

What causes goosebumps? See the tiny arrector pili muscles pull each hair upright, why cold, fear and music all trigger them, and what they were for. Chapters 0:00 Start 0:31 The tiny muscle 1:18 Who pulls the strings 2:00 The original job 2:51 Chills from a song 3:42 A leftover with a twist Narrated for ages 7–12. Every scene is painted from real photos. Facts checked against trusted sources. ahaboo makes hand-drawn, narrated explainers of how things work, for curious minds.