Science May Have Finally Explained The Reason Why We Still Get Goosebumps – ScienceAlert

We all know what goosebumps are, but why have we evolved to hang on to this seemingly pointless physical reaction to the cold? New research suggests an answer: regulating stem cells that control hair follicles and hair growth.
In a detailed analysis of mice, scientists found that the specific muscles that contract when goosebumps appear are connected to the sympathetic nervous system. When low temperatures are sensed, these muscles bridge the gap between sympathetic nerves and hair follicles.
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