In addition to their fame, Babe Ruth, Oprah Winfrey, Lady Gaga, and David Bowie have something else in common: left-handedness. The characteristic is quite a rare one, as only about 10% of the population are southpaws, according to one meta-analysis.
Left-handedness lore abounds, and if you know (or are) a lefty, you’re likely familiar with some of the traits commonly associated with it, like creativity and independence. These notions often stem from the long-held belief that people who use their left hands are right-brain dominant in all of life.
While it’s true that the right brain does control the left side of the body, and each hemisphere is responsible for certain specializations, like language processing, the idea that any human (who hasn’t undergone surgery or a brain injury) uses one side of the brain predominately is likely a myth, research has shown. And of course there’s the fact that around 1% of the population is considered ambidextrous, not having any clear preference for using one hand or the other.
That said, there is evidence that indicates left-handed people think differently in certain ways, which may in turn help them access creativity more easily than others. “There’s a grain of truth to the creativity idea,” Ronald Yeo, a professor of psychology at the University of Texas-Austin, told CNN, “but when you look at actual creative achievements in one’s lifetime, the evidence is not strong for association with left-handedness.”
Science never stops, though, and new studies are coming out left and right (pun intended) that offer insight on hand dominance. One of the biggest remaining questions is why some people are left-handed.
A paper published in the journal Nature Communications in April has shed some light on this mystery, specifically the potential genetic component of being left-handed. Researchers discovered that rare variants of a gene called TUBB4B, which is involved in controlling cell shape, are 2.7 times more prevalent in lefties. Researchers think these variants might therefore play a role in how our brains develop and determine which hand we prefer to use.
“Most people have left-hemisphere dominance for language, and right-hemisphere dominance for tasks that require directing visual attention to a location in space,” senior author Clyde Francks told Reuters. “In most people, the left hemisphere also controls the dominant right hand. The relevant nerve fibers cross from left-to-right in the lower part of the brain. In left-handers, the right hemisphere is in control of the dominant hand. The question is: What causes the asymmetry of the brain to develop differently in left-handers?”
Francks and his fellow scientists have only just begun to answer that question but note that their research could have implications beyond left versus right-handedness, specifically in the field of psychiatry. “Rare genetic variants in just a handful of people can pinpoint genes that give clues to developmental mechanisms of brain asymmetry in everyone,” he said.
Though this study and previous ones have linked left hand dominance to specific genes, the trait isn’t a given when those genes are present. In fact, even when both parents are left-handed, the chance of their child following suit is only around 27%.
“We think that most instances of left-handedness occur simply due to random variation during development of the embryonic brain, without specific genetic or environmental influences,” Francks explained.
Stories like this remind us of the power of human ingenuity and compassion. In a world where headlines are often dominated by negativity, it is refreshing to see developments that inspire hope and positive change. The story behind why are some people left-handed? study sheds light on possible genetic origins is one that resonates with people across different backgrounds and cultures, highlighting the universal desire for progress and connection.
Medical breakthroughs continue to reshape our understanding of human health. Researchers around the world are collaborating on innovative treatments and preventive measures that could improve the quality of life for millions of people. From advanced diagnostic tools to personalized medicine, the healthcare landscape is evolving at a remarkable pace. These developments are not just about extending lifespans but also about enhancing the daily well-being of individuals living with chronic conditions or facing new health challenges.
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Scientific discovery has always been driven by curiosity and the desire to understand the world around us. Modern research tools and international collaboration have accelerated the pace of discoveries, leading to breakthroughs that would have been unimaginable just a few decades ago. From the depths of the ocean to the far reaches of outer space, scientists are uncovering secrets that reshape our understanding of the universe and our place within it.
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Wildlife conservation efforts have gained significant momentum in recent years as more people recognize the importance of protecting biodiversity. From habitat restoration projects to breeding programs for endangered species, conservationists are working tirelessly to ensure that future generations can experience the rich diversity of animal life on our planet. The connection between healthy ecosystems and human well-being has become increasingly clear, driving both policy changes and grassroots action around the world.
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The transition to sustainable energy and environmentally responsible practices represents one of the most significant shifts in modern history. Communities around the world are embracing renewable energy sources, reducing waste, and reimagining how we interact with the natural environment. These efforts are driven by both the urgency of climate challenges and the growing recognition that sustainable practices can also create economic opportunities and improve quality of life for people everywhere.
Education and awareness play crucial roles in driving environmental change. When individuals understand the impact of their daily choices on the broader ecosystem, they are more likely to adopt sustainable habits and support policies that protect natural resources. From school programs teaching children about conservation to community initiatives that promote recycling and responsible consumption, every effort contributes to building a more sustainable future for all.
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Art and creative expression have always played a fundamental role in how we process emotions, communicate ideas, and build connections across cultures. Whether through visual arts, music, literature, or performance, creative works have the power to inspire, challenge, and heal. In an increasingly digital world, artists are finding new ways to reach audiences and create experiences that bridge traditional and contemporary forms of expression.
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Looking ahead, developments like the one described in this story offer a glimpse into a future filled with possibility and positive change. While challenges certainly remain, the creativity, determination, and compassion demonstrated by the individuals and organizations involved serve as a powerful reminder that progress is always within reach when people are willing to work together toward a common goal.
As we continue to navigate the complexities of modern life, stories like these provide both inspiration and practical examples of how innovation, kindness, and perseverance can make a real difference. By sharing and celebrating these achievements, we not only honor the efforts of those involved but also encourage others to pursue their own ideas for creating positive change in their communities and beyond.
Interested in joining the ranks of the ambidextrous? With practice, it is possible to improve the dexterity of your non-dominant hand. Check out these tips and tricks.
