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If you look at a cat that’s facing off against a dog, you’ll often see its hair standing on edge. But you don’t see the goosebumps hidden underneath their fur, which they also get when they’re scared.
Goosebumps are a reaction to increased adrenaline, which is why we get goosebumps when cold or emotional. Although we don’t really need them now, our ancestors would have needed them when facing off against large beasts before the age of humanity began!
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