In this episode of “Ok Now You Know,” host Joe Garner explores the fascinating world of goosebumps. Through a blend of evolutionary biology and psychology, Joe unravels why these tiny bumps appear on our skin in moments of cold or powerful emotion. By examining the role of the tiny muscles called arrector pili and the body’s autonomic nervous system, he offers insights into this curious bodily response.

Goosebumps are more than just a quirky reaction; they are an evolutionary remnant from our fur-covered ancestors. For animals, puffing up fur can provide insulation and make them look more intimidating to predators. Today, while the insulating effect is minimal for humans, the phenomenon still offers a peek into our evolutionary past. Additionally, goosebumps are intricately linked to our emotions, showing up during moments of intense feelings such as awe, excitement, or fear. This connection highlights the role of adrenaline in our fight or flight response and the complex interplay between our physical and emotional selves.