A team of researchers announced that it has found the earliest known evidence of sexual combat in the form of a trident-headed trilobite that scuttled the seafloor 400 million years ago.
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. From a deer’s elaborate branching antlers to the fiddler crab’s oversize claw, the animal kingdom is full of flashy features used in combat to help secure a mate.
The researchers used a technique called landmark-based geometric morphometrics, which Gishlick described as a means of comparing complex shapes in a statistically robust way, to analyze the surface-level similarity of trilobite tridents and horns of rhinoceros beetles. They found that the trilobite tridents’ shape had a lot in common with the horns of beetles that flip their dueling partners in a “shoveling” motion, as opposed to other species whose horns are better for fencing or grasping.
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