Your arm just turned into a tiny mountain range — and it's a leftover from when you were furry. Here's why goosebumps still happen. ❄️ Tiny muscles under every hair pull them upright — a leftover reflex from our furry ancestors that still fires in the cold and during powerful music. This video was created with AI-generated visuals and voiceover. #sciencefacts #humanbody #didyouknow #goosebumps #psychologyfacts #learnontiktok #stickman #mindblown
