Observing the beetles’ behavior, it became clear why only some species have big weapons. The same simple trigger leads to evolutionary arms races all across the animal kingdom. From the fiddler crab’s prodigious claw on up to the elephant’s crescent tusks, extreme weaponry has the same root cause: violent dueling, in which the lesser-armed combatant loses out.
The Astonishing Weaponry Of Dung Beetles
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