Cats have 32 muscles in each ear — humans have 6. Those muscles let them rotate ears 180 degrees independently, like satellite dishes. They can hear ultrasonic frequencies up to 64kHz (humans 20kHz) and pinpoint a mouse rustle in 0.06 seconds. The ear muscles are so precise they work like a built-in amplifier. That's why a cat can nap and still twitch an ear toward you opening a tin 2 rooms away.
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