Only humans have chins?

Humans have some biological advantages over other species. The most obvious is our large brain, which has enabled us to become the dominant species on Earth. But what if we are looking for something uniquely human? jaw. Wait, what?

That’s right—we’re the only animals on Earth with real jaws. While we're all familiar with scratching a puppy or kitten by the "chin," that's not really what we're scratching at all. We're scratching their mandible, the lower part of their jaw. A true chin—what humans have—is a bony protrusion at the base of our face. Specifically, it is a piece of bone that projects forward from the lower jaw. Even our extinct relatives Homo erectus, as well as chimpanzees and gorillas, lacked chins.

Elephants and manatees have chin-like protrusions on their lower jaws, but they don't quite qualify as true jaws.

The most confusing part? Scientists discovered that the chin serves no real purpose. There is a theory that our jaws help us chew.

Researchers say it's unlikely that chins are a product of sexual selection or a protective measure against violence . Many believe the chin may be a "spandrel" - a byproduct of evolution. Spandrels arise due to the evolution of a feature, but the unexpected feature may not have any function. therefore,

We may never know why we have these bony protrusions, but we should still be proud of our faces and hold our heads high. After all, we are the only ones who can.