Just a little fascinating tidbit about chameleons: The chameleon's tongue has an accelerator muscle, which by itself is not strong enough to achieve the high speed. The tongue is bound, though, to 10 newly-discovered sheaths, tied to the tongue bone, that literally catapult the tongue outwards. (At 50 G's) These sheaths contain a spirally-wound protein that store energy “like a stretched rubber band.” As the tongue accelerates, the sheaths release their energy, then telescope outward to allow the tongue to reach its maximum extent – twice the chameleon’s body length. Facing a predator so armed, the fastest fly doesn’t stand a chance.
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