A hairy business

Let your hair down: 10 amazing facts about human hair

Image: Ali Pazani

The human body is incredible, from its mechanics to its ability to heal and adapt to multiple environments and situations. Hair, as part of our body, is no exception to this complexity and wonder. Let’s take a look at 10 amazing facts about our hair that you may not know!

Image: Ian Talmacs

The word hair is used to describe two separate and distinct components: the follicle and the shaft. The follicle—what we commonly refer to as the root—is a living organ located in the dermis of the scalp. It’s responsible not only for growing hair but also for helping regenerate skin after a wound.

On the other hand, the shaft—often referred to as the strand—is a filament composed of layers of keratin, the same protein that makes up our nails. Unlike the follicle, the hair shaft is technically dead because it consists of dead cells.

Image: Joyful Bird

Each hair strand is composed of three layers. The innermost layer is the medulla, and even scientists are still uncertain about its exact function. Surrounding the medulla is the cortex, which absorbs water and provides strength to the strand. The cortex also contains melanin, the pigment that determines hair color, and its shape plays a major role in whether hair is straight or curly. The outermost layer is the cuticle, which serves primarily to protect the hair shaft.

Image: Tyler McRobert

Hair color is primarily influenced by several genes, including MC1R, which plays a key role in melanin production. However, not everyone produces the same type or amount of melanin. Higher amounts of melanin result in black hair, while varying levels and types of melanin—along with genetic variations—produce brown, blond, and other shades.

Red hair, the rarest natural color, is caused by a mutation in the MC1R gene and is inherited in a recessive pattern. This means a person must inherit two copies of the mutated gene (one from each parent) to have red hair, though many people carry the gene without expressing the trait.

Image: William Warby

Growing at a rate of about 0.2 to 0.5 inches per month, hair is the second-fastest growing tissue in the human body—surpassed only by bone marrow. This rate is influenced by factors such as genetics and ethnic background. Other variables, such as age, lifestyle, or health, can also have an impact on our hair growth and density.

Image: Sohan Rahat

We usually think of cats or dogs when it comes to shedding, but humans also shed hair regularly. After all, hair is a trait shared by all mammals. The average person sheds between 50 and 100 strands of hair per day, though this number can increase in response to stressors such as illness, hormonal changes, or emotional stress. Once the stress subsides and the body readjusts, the excess shedding typically stops.

Image: Joseph Chan

Commonly associated with aging, grey hair isn’t a color in itself but rather the result of a loss of pigment. As part of the natural aging process, melanin production in the hair follicle gradually decreases and eventually stops, causing strands to appear grey or white.

Genetics and ethnic background play a major role in determining when and how the greying process begins. Some people are even genetically predisposed to start greying at a very young age.

Image: Jaroslav Devia

Hair texture is commonly associated with ethnic background, but that’s not the only factor involved. Texture is primarily determined by genetics, and while genetics are closely tied to ancestry, all hair textures can be found across different populations.

Scientists believe that hair texture—specifically curl pattern and volume—is a result of the shape of the shaft. A round shaft typically produces straight hair, while flatter or more oval-shaped shafts tend to create curls and waves.

Image: Amritanshu Sikdar

Depending on the structure of your hair cuticle, your hair may be more or less water-repellent. Hair shafts with a more porous cuticle absorb water easily but also lose moisture quickly. In contrast, shafts with a tighter-packed cuticle struggle to get wet and are slow to dry.

Image: Sonja Langford

Hair doesn’t grow continuously or all at once—each strand follows a cycle with distinct phases. First comes the growing phase, which varies depending on the type of hair (for example, facial hair grows faster and for a shorter period than scalp hair). Eventually, growth slows down, and the strand detaches from the root.

After this, the hair enters a resting phase, during which it remains in place until it is naturally shed. At any given time, we have hairs in all stages of this cycle, which is why we regularly shed hair without going bald.

Image: Hans Reniers

Like any other part of the body, hair contains DNA and genetic material, which means a person can be genetically identified from a single strand, provided it includes the root. But hair holds even more information. The analysis of a hair strand can reveal substances that were present in a person’s bloodstream over time, including vitamins, minerals, medications, alcohol, and other substances.

IN GOOD SPIRITS

Do You Know The Origin Of These 10 Alcoholic Beverages?

Image: Adam Wilson

You probably know many alcoholic beverages that you enjoy drinking alone or combined in different cocktails, but do you know where their names come from? From whiskey and gin to rum and absinthe, the origins of spirits have fascinating stories to tell. Are you ready to explore them? You will surely learn some curious facts to share at your next party!

Image: emkanicepic

Whiskey is one of the most consumed alcoholic beverages in the world. It is produced by distilling malt fermented with cereals such as wheat, barley, corn, and rye, and the resulting spirit is subsequently aged in white oak barrels.

In the Middle Ages, alcoholic beverages were classified into two main groups: "aqua ardens" (burning water) and "aqua vitae" (water of life). Whiskey falls into the category of "aqua vitae." The Latin term was translated into Middle Irish as usque beatha, which in turn derived into usquebaugh, pronounced: "wiskyba," giving rise to "whisky" (Scotland) and "whiskey" (Ireland and the United States).

Image: Timothé Durand

The word brandy is an abbreviation of brandywine, an English term dating from the early 17th century. It comes from the Dutch brandewijn, meaning "burnt wine" or "burning wine," referring to the distillation process.

Brandy is made from the distillate of wine or fermented fruit pulp, primarily grape skins. There are different types of brandy. Perhaps one of the best known is cognac, a high-quality wine distillate, named after the city in France where it is produced.

Image: John Fornander

Gin is a distilled drink made from juniper berries, among other ingredients. The term gin is an abbreviation of the Old English word genever, which in turn derives from the Dutch jenever and the French genièvre. Moreover, all these words trace back to the Latin word for juniper, juniperus.

This drink emerged among European monks during the Middle Ages as a medicinal liquor. Then, in the 17th century, gin gained popularity in England and transitioned into the modern drink we know and love. Nowadays, gin is used to prepare different cocktails, including Tom Collins, Negroni, and the popular Gin & Tonic.

Image: C D-X

The first references to this drink date back to the mid-17th century in Barbados, a small Caribbean island with sugar plantations that was under British rule for several centuries. When rum began to be produced on a large scale in the colonies, the English imported it to Europe and popularized it throughout the continent.

There are many theories about the origin of the word rum. The most accepted one suggests that it comes from the English slang word rumbullion which means "great tumult." This term might have originated in the Devonshire area on the southwest coast of England. From rumbullion, it became known as rum in English, rhum in French, and ron in Spanish.

Image: Deeliver

Vodka is an emblematic drink of Eastern European countries and is used to prepare a multitude of cocktails, including the Martini Vesper, Moscow Mule, White Russian, Cosmopolitan, and Bloody Mary, among others. The word vodka comes from the Russian word voda, which means "water." The ending -ka makes it diminutive, translating to "little water."

Vodka is a distillate that comes from the fermentation of potatoes, wheat, barley, grapes, beets, or any plant rich in starch. Originally, the aim was to obtain a simple, alcoholic liquid composed of ethanol and water, with no pretensions in terms of aroma or flavor. It also needed to have a high alcohol content to cope with the harsh Russian winters. Traditionally it has a graduation around 40º, although there are vodkas that reach 80º and up to 96º. It is hard to believe that it’s simply called water!

Image: Ryan Parker

This distillate made mainly from corn, was first introduced in the United States in the 18th century. The first known producer was Reverend Elijah Craig, a Baptist minister. Legend has it that the clergyman established the first distillery in Fayette County, Kentucky, with the help of a Southern farmer who provided surplus corn from his harvest.

Although it was born in Fayette, this variety of whiskey was named after another nearby county, Bourbon County, where the spirit began to be produced on a large scale. The names of both Kentucky counties have their origin in the same historical figure: Gilbert du Motier, the Marquis de Lafayette, a French aristocrat related to the House of Bourbon.

Image: Giorgio Trovato

The word vermouth comes from the German word wermut, which means "wormwood," one of the main herbs used to make this beverage. This fortified wine, flavored with different botanicals (flowers, herbs, roots, and spices), has been used since ancient times for medicinal purposes. However, the modern version we know today was first introduced in Turin, Italy, in the 18th century.

In the 19th century, vermouth became a global trend thanks to the rise of bars and cocktails, as it was —and still is— an essential ingredient to prepare classic drinks such as Martinis, Negronis, and Manhattans.

Image: Deeliver

Tequila is, without a doubt, a staple of Mexican culture and a famous drink around the world. In ancient times, it was considered a gift from the gods. Today it’s served as an aperitif or combined with other beverages and ingredients to prepare cocktails.

This spirit is produced from the distillation of fermented juice obtained from the heart of a plant known as "blue agave." Its name comes from the Nahuatl word Tekilan, which means "place of the workers."

Image: alandiaspirits

This popular anise-flavored spirit, made from wormwood oil and other herbs, has a high alcohol concentration. With a bitter taste, absinthe’s color is usually pale green. Its name derives from the Latin absinthium, which in turn comes from the Greek apsínthion, meaning "wormwood."

The use of wormwood to make alcoholic beverages dates back to the 1st century, but it was not until the end of the 18th century, in French-speaking Switzerland, that the drink we know today was created. At the end of the 19th century, absinthe, often called "Green Fairy," was the most popular spirit in Europe, enjoyed by all social classes, especially artists and bohemians. However, years later its consumption was limited because it could cause hallucinations, which gave birth to the term absinthism.

Image: eKokki

Peru and Chile, neighboring South American countries, share many things: the Andes mountain range, common ancestors, customs, and, notably, the debate over the origin of pisco. The true birthplace of this spirit has long been questioned, with both countries claiming it as their own. What we do know is that the name pisco may derive from the Quechua word Pisku, meaning "bird."

Peruvian and Chilean pisco are different varieties but have in common that they are grape distillations, made similarly to brandy and cognac. Despite the ongoing controversy, no one should miss trying a good pisco sour!