Never miss a story

Get subscribed to our newsletter

According to studies dating back to the 1980s, our preference for the right or left hand is most likely decided before we are even born. Pixabay


About 10% of the world’s population, or 700 million people, are left-handed, and August 13 is designated as International Left Hander’s Day. Despite accounting for up to 10% of the population, left-handed people are often labeled as odd. In fact, the Italian word for left ‘sinistra’, is derived from the Latin word for sinister. But the real question is why certain people are born left-handed?

According to studies dating back to the 1980s, our preference for the right or left hand is most likely decided before we are even born. Ultrasound screening revealed that a preference for moving the left or right hand emerges in the womb as early as the eighth week while sucking the right or left thumb begins in the thirteenth week. However, a group of scientists from the Netherlands, the United Kingdom, and China conducted a genetic study to determine what factors led to the nervous system’s left-right variations.

Follow NewsGram on LinkedIn to know what’s happening around the world.

The researchers discovered that gene activity in the spinal cord was asymmetrical in the womb, which may explain whether people became left or right-handed. Arm and leg movement start in the brain, in an area, called the motor cortex. This cortex sends signals to the spinal cord, which allows the movement of our arms and legs. The study concluded that variations in gene expression, rather than the genes themselves, have an effect on species.

It’s partly genetic and partly environmental that people tend to use one side over the other. Pixabay

These changes are often caused by environmental factors and can have an impact on a baby’s development. Enzymes can bind methyl groups to DNA as a result of these environmental factors, affecting and minimizing gene reading. When it comes to the rarity of left-handed individuals, researchers conclude that a high level of engagement, rather than something strange or sinister, plays a key role. ‘The more social the animal where cooperation is highly valued, the more the general population will lean towards one side,’ says researcher Daniel Abrams.

ALSO READ: A Device That Can Recognize Hand Gestures Based On Electrical Signals

Using a mathematical model, researchers discovered that the low percentage of lefties is the result of the balance between cooperation and competition in human evolution. All would be even-handed if communities were fully cooperative. However, if competition were a great factor, the population would be split 50/50. In reality, we humans seem to prefer right-handedness more than left-handedness.

So, considering their genetic predisposition, someone who deviates from this may have been conditioned to use the left hand primarily. As a result, left-handedness is an uncommon occurrence. It’s partly genetic and partly environmental that people tend to use one side over the other.


Photo by Flickr.

Swastika, one of the sacred symbols used by many religions like Hinduism, Jainism, and Buddhism.

The symbol of Swastika is known to signify peace, prosperity, and good fortune in the religious cultures of Eurasia. In fact, this symbol is considered very significant in Hinduism, Buddhism, and Jainism. But, at the same time, it has become one of the most misunderstood religious symbols and has been globally banned in many countries.

The reason why the symbol of Swastika is banned in many countries is because of its association with Adolf Hitler's extreme political ideology, Nazism, as Swastika as its official symbol.

Keep Reading Show less

Since emerging into the public eye with a historic gold medal at the junior world championships in 2016, he has maintained a high level of performance

India celebrated a historic day on August 7, as 23-year-old Neeraj Chopra became the first Indian to win an Olympic gold medal in athletics. In the men's javelin throw event, he achieved his greatest triumph, throwing the javelin 87.58 meters on his second try.

Neeraj Chopra was born on December 24, 1997, in Khandra village in Haryana's Panipat district. He grew up in a Haryanavi family of farmers. He is the brother of two sisters. He graduated from Dayanand Anglo-Vedic College in Chandigarh and is now enrolled in Lovely Professional University in Jalandhar, Punjab, pursuing a Bachelor of Arts degree. Chopra was bullied due to his obesity as a kid, which prompted his father to enroll him in a nearby gym. He then joined a gym in Panipat, where Jaiveer Choudhary, a javelin thrower, noticed his potential and coached him. When the 13-year-old Chopra finished training under Jaiveer for a year, he was enrolled at the Tau Devi Lal Sports Complex in Panchkula, where he began training under coach Naseem Ahmed.

Keep Reading Show less
wikimedia commons

Gothic dresses displayed in a store

The emergence of the Industrial Revolution in Victorian England brought with it many apprehensions and fears that translated into a new genre in literature: the gothic. Today, the idea of the gothic does not have to much with literature as much as it is associated with fashion.

The Victorians began to wear black more often during the Industrial Revolution to hide the stains of soot on their clothes. Many of the working class were employed in factories. They were newly introduced to technology, the idea of coal as fuel, and the working of machines to serve a certain purpose. This kind of work was hard and messy. Wearing light colours burdened the tired folk when the stubborn stains did not get washed away.

Keep reading... Show less