Humans Are Still Evolving: Wisdom Teeth Disappearing and New Bones Emerging

Evolution isn’t just a thing of the distant past; it’s happening right now, and the evidence is all around us. From disappearing wisdom teeth to the emergence of new bones, scientists are uncovering fascinating signs of rapid human evolution.

According to Dr. Teghan Lucas of Flinders University in Adelaide, these changes are part of what researchers call “micro-evolution”—evolutionary changes that occur over relatively short periods of time.

Why Are Wisdom Teeth Disappearing?

One of the most striking changes observed in humans is the disappearance of wisdom teeth. Historically, larger jaws were necessary for our ancestors to chew tough, raw foods. However, modern diets consisting of cooked and processed foods have led to smaller jaw sizes. With less room in our mouths, wisdom teeth are no longer essential—and in many cases, they don’t develop at all.

Dr. Lucas explains that this is a clear indicator of how human anatomy is adapting to lifestyle changes. “It’s a sign that evolution is still very much at play,” she notes.

Smaller Jaws and Weaker Chewing Muscles

The reliance on fire and softer diets has also contributed to weaker jaw structures. As humans shifted from hunter-gatherer diets to agricultural and processed foods, the demand for strong chewing muscles diminished. This anatomical shift has not only influenced our teeth but also how our faces have become shorter and smaller over generations.

Emergence of New Bones and Arteries

While some features are disappearing, others are emerging. Researchers have found that some people are now born with additional bones in their arms and legs, as well as an extra artery in the forearm. This artery, called the median artery, typically disappears after birth, but it’s becoming more common for it to persist into adulthood.

There’s also evidence of abnormal connections between bones in the feet, further underscoring how human anatomy continues to evolve in response to environmental and lifestyle factors.

Why These Changes Matter

The study, published in the Journal of Anatomy, highlights how human evolution is not only ongoing but accelerating. These changes provide insight into how our species is adapting to modern life. From dietary shifts to new technologies, our biology is responding in ways that could shape the future of humanity.

This micro-evolution is a reminder that evolution doesn’t always happen over millions of years—it can be observed within a few generations.

What Does This Mean for the Future?

As humans continue to adapt to new environments and lifestyles, more changes are likely on the horizon. Whether it’s the loss of unnecessary features like wisdom teeth or the emergence of new structures, our evolution is an ongoing process.

For scientists, studying these changes offers a glimpse into how our species is evolving in real time. For the rest of us, it’s a fascinating reminder that evolution isn’t just history—it’s happening right now.

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