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A three-way sex struggle resembling the game rock-paper-scissors may have existed for 175 million years or more in lizards, research now suggests.
The reptilian triads may be far more common than previously recognized—and may even shape the way humans behave, the scientists said
Orange-bellied males are brutes that invade other lizards' territories to mate with any female they can hold. But while they're gone, yellow-bellied males sneak deceptively onto the vacant territory and mate with undefended females. White-bellied males guard their mates closely and ally with other white-bellied lizards to keep the yellows at bay. Thus the analogy to rock-paper-scissors—orange force defeats white cooperation, cooperation defeats yellow deception and deception defeats force.