https://tube.blueben.net/videos/watch/34da5d8d-1836-4150-98ef-ac9b527ed5c0 What Is Inside A Goosebump? Goosebumps form when tiny arrector pili muscles contract, pulling hairs upright. Controlled by the fight-or-flight nervous system, this reflex once helped our hairy ancestors trap warmth and appear larger to predators. Humans lost most body hair, but the ancient response remains. Mon, 14 Sep 2026 14:06:54 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://tube.blueben.net https://tube.blueben.net/client/assets/images/icons/icon-96x96.png https://tube.blueben.net/videos/watch/34da5d8d-1836-4150-98ef-ac9b527ed5c0 All rights reserved, unless otherwise specified in the terms specified at https://tube.blueben.net/about and potential licenses granted by each content's rightholder.