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Bones That Heal at Exact Frequencies
Cats purr at a magic frequency of around twenty six hertz. Scientists studying vibration therapy found that exact mechanical shakes stimulate bone growth and density, acting like a tiny internal cast. When astronauts live in zero gravity, their bones get weak because they lack Earth weight, so researchers actually looked at purring to invent healing vibration plates for space travelers. It turns out your skeleton is basically a tuning fork that listens closely to physical stress and repairs itself faster when specific rhythmic pulses shake it gently awake.