Seven Evolutionary Leftovers In the Human Body

Image Credit: Ildar Sagdejev

In mice and other animals, the tiny vomeronasal organs (VNOs) are thought to be responsible for pheromone detection, helping to pick up the chemicals that signal a potential mate, reproductive status, and other social cues. Although similar structures have been found in humans, they’re largely thought to be vestigial and inactive, having lost nerve connection to the brain.

There are other vestigial and atavistic structures in humans, especially when you consider the potential leftovers in our genomes. And if they don’t require too much energy or resources to make, chances are they’ll stick with us for the long haul.

Read about the other six at Divine Caroline.

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