In a recent study published in the journal Nature, researchers from the University of Chicago have identified a mechanism that explains why some species of animals may have evolved to be more attractive than others. The study found that when animals are attractive, they are more likely to mate with multiple partners, resulting in more offspring with good genes. However, this also leads to more competition among males for the same females, which can lead to increased aggression and sexual conflict. The researchers believe their findings could help explain the differences in attractiveness between species.

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source: Phys.org