Cactus is full of sharp thorns. Why can't camels get stuck in their mouths when they eat?

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Life Cactus is full of sharp thorns. Why can't camels get stuck in their mouths when they eat?
2019-07-05 10:49:41 ·
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The animal world has its own set of evolutionary rules
Tags：Cactus evolution, camel cactus, cactus spine, biological evolution
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