Time changes everything

Did you know that a computer used to be a person? Job titles evolve, too

Language preserves history in unexpected places. Many job titles that seem ordinary today began with entirely different meanings, reflecting the needs of medieval kingdoms, noble households, religious institutions, and even long-forgotten professions. Although the work behind these titles has changed dramatically over the centuries, the words themselves continue to carry traces of the past wherever they are used.

Today, a secretary is usually associated with calendars, correspondence, and office organization. But centuries ago, a secretary was a trusted keeper of confidential information. The word comes from the Latin secretarius, referring to someone entrusted with secrets and private affairs.

In royal courts and governments, secretaries often served as influential advisers rather than clerical workers. The title still carries traces of that earlier status in positions such as Secretary of State, where the role involves high-level decision-making rather than routine paperwork.

A modern clerk may work in an office, store, courthouse, or government agency. Originally, however, a clerk was a member of the clergy. During the Middle Ages, churches and monasteries were among the few places where people regularly learned to read and write.

Because clergy handled many written records, the word gradually became associated with literacy itself. As education spread beyond religious institutions, the meaning shifted from "churchman" to someone responsible for records, documents, and administrative work.

Today, marshals are often law enforcement officers or senior military officials. The title has surprisingly humble roots. It comes from an old Germanic term meaning something close to "horse servant" or "keeper of horses."

In medieval times, horses were essential for transportation, communication, and warfare. The official responsible for managing them gained increasing authority, and over centuries, the role evolved into one of the most prestigious military and governmental titles in many countries.

Modern Americans know sheriffs as elected county law-enforcement officials. The title dates back more than a thousand years to Anglo-Saxon England, where a sheriff was known as a shire-reeve.

A shire was a county, and a reeve was a royal administrator. Early sheriffs collected taxes, enforced the king’s orders, managed courts, and supervised local government. Fighting crime was only one part of a much broader set of responsibilities.

The butler is often portrayed as the head servant in a grand household. Yet the job originally revolved around something much more specific: wine. Early butlers were responsible for managing wine cellars and serving valuable beverages.

Because wine represented both wealth and status, the position required trust and responsibility. Over time, butlers gained authority over other servants and eventually became the chief managers of large households.

Today, the title steward may be used for airline attendants, ship personnel, or event supervisors. Historically, a steward was a powerful official responsible for managing a noble household, estate, or even an entire territory.

The word comes from Old English terms meaning "household guardian." Medieval stewards oversaw finances, property, staff, and daily operations. Some became influential political figures who effectively governed on behalf of kings and nobles.

Most people immediately think of medicine when they hear the word doctor. Originally, however, a doctor was simply a teacher. The word comes from the Latin docere, meaning "to teach."

Medieval universities awarded the title to scholars qualified to instruct others at the highest level. Long before it became closely associated with physicians, doctors could be experts in theology, law, philosophy, and other academic disciplines.

A minister today can lead a government department or serve as a religious leader. The word’s original meaning is surprisingly modest. In Latin, minister meant "servant" or "attendant."

The title emphasized service rather than authority. Over time, ministers became trusted representatives of rulers and governments, eventually overseeing major areas of public policy while retaining a word that originally suggested humility and assistance.

Modern engineers design everything from skyscrapers to software. The title originally referred to specialists who built or operated military "engines," a term once used for siege machines such as catapults and trebuchets.

These experts combined technical skill with practical problem-solving. As technology expanded during the Industrial Revolution, the meaning broadened dramatically, eventually encompassing the countless engineering fields that exist today.

An accountant now manages financial records, audits, taxes, and budgets. Historically, the role was more closely tied to giving an account: that is, explaining how money or resources had been used.

Kings, merchants, and estate owners needed trusted individuals to report on financial matters. As trade and commerce became more complex, accounting evolved into a highly specialized profession recognized around the world today.

For centuries, a computer was not a machine at all. It was a person whose job involved performing calculations. Governments, observatories, universities, and scientific organizations employed teams of human computers to solve mathematical problems.

Human computers played important roles in astronomy, navigation, engineering, and even early space research. Only in the mid-20th century did electronic machines become so closely associated with the work that they inherited the title themselves.

Today, pilots are most commonly associated with airplanes. Yet the word was guiding vessels long before powered flight existed. Originally, a pilot was an expert navigator who directed ships through difficult harbors, rivers, and coastal waters.

These specialists relied on detailed local knowledge to help vessels avoid hazards and reach their destinations safely. When aviation emerged in the early 1900s, the title naturally transferred to those guiding aircraft through the skies.

The truth about your brain

You won’t believe what happens in your brain while you sleep

Image: Milad Fakurian

Your brain is one of the most powerful and mysterious organs in your body. It controls everything from your thoughts to your emotions and even processes information at lightning speed. But how much do you really know about it? Some long-believed myths about the brain have been debunked, while other surprising facts reveal just how incredible this organ truly is. Get ready to be amazed by these fascinating brain facts!

Image: Natasha Connell

You’ve probably heard this one before, but it’s completely false! While it’s true that not all parts of the brain fire at the same time, imaging studies show that most regions are active throughout the day, even when we sleep.

Your brain is constantly working, controlling bodily functions and emotions, and processing information. So next time someone says you’re only using 10% of your brain, you can confidently tell them that’s just a myth!

Image: Aarón Blanco Tejedor

Here’s a weird fact: While your brain processes pain signals from the rest of your body, it has no pain receptors of its own. This is why surgeons can perform brain surgery on conscious patients without causing them pain.

However, the membranes and tissues surrounding the brain do have pain receptors, which is why headaches and brain injuries can be so excruciating.

Image: Usman Yousaf

How come we have headaches if the brain has no pain receptors? Well, that’s because headaches are triggered by chemical activity in the brain, changes in nerves and blood vessels, and even fluctuating serotonin levels.

In some cases, hormones like estrogen can also play a role, which explains why migraines are more common in women.

Image: Go to Johannes Plenio's profile Johannes Plenio

Dreams are proof that your brain never rests! (Warning: this fact can make you feel exhausted.) While you sleep, your limbic system, that is, the part of the brain that deals with emotions, becomes especially active, which is why dreams often feel so intense.

On average, humans experience four to seven dreams per night, even if we don’t always remember them. And what about that scary nightmare about falling? Well, you can thank your amygdala, the brain’s fear center, for that one.

Image: Brett Jordan

Have you ever walked into a room and instantly forgotten what you were after? That’s because short-term memory only lasts about 20-30 seconds! That’s not enough!

Your brain holds a limited amount of information in its active state before deciding whether to store it or discard it. Ironically, we can’t really choose what makes the cut, but we do hope these facts stay with you!

Image: BUDDHI Kumar SHRESTHA

That sharp, icy pain when you eat something too cold? It’s your brain’s way of telling you to slow down! Officially called sphenopalatine ganglioneuralgia, a brain freeze happens when cold food or drinks rapidly chill the blood vessels in your throat, causing them to constrict and then rapidly expand. This sends pain signals to your brain, warning you of the sudden temperature shift. It’s annoying, but it’s actually your body trying to protect itself!

Image: Josh Riemer

You didn’t need us to tell you, but let’s look at the details: The average person has between 12,000 and 60,000 thoughts per day. What’s even more interesting? 95% of those thoughts are the same ones you had yesterday. Is that not surprising enough? Hear this out: 80% of them tend to be negative. That’s because our brains are wired for survival, constantly analyzing risks and potential dangers.

Image: Terry Vlisidis

Even though it only makes up about 2% of your body weight, your brain employs a major quantity of energy! It consumes 20% of your oxygen and blood supply, making it one of the most demanding organs in your body.

If your brain goes without oxygen for just five minutes, brain cells start dying, leading to irreversible damage. This is why deep breathing and cardiovascular exercise are great for brain health!

Image: Alexander Andrews

Do you know that feeling when you hit the back of your head and see stars? That’s because your occipital lobe, which controls vision, is located at the back of your brain. If you get hit there, your brain momentarily misfires, causing flashes of light.

Interestingly, your brain processes vision on the opposite side; while your right brain controls your left eye, your left brain controls your right eye. It’s one of the many ways the brain operates in a complex way.

Image: Rodion Kutsaiev

Believe it or not, your brain generates between 12 and 25 watts of electricity when you’re awake. If you can’t really grasp how powerful that is, check this out: It’s enough to power a small light bulb! Your brain’s electrical activity is what allows neurons to send signals at speeds of up to 260 miles per hour.

Image: Robina Weermeijer

Your brain may be the fattiest organ in your body, consisting of at least 60% fat! This is why consuming healthy fats, like omega-3s and omega-6s present in fish, for example, is essential for brain health.

Healthy fats stabilize brain cell walls, reduce inflammation, and support cognitive function. So go ahead and enjoy that avocado toast, it’s food for your brain!

Image: Robina Weermeijer

It’s not just your memory that fades over time; the brain itself physically shrinks as one gets older. It continues developing until your late 40s, but after that, it slowly decreases in size.

Now, size doesn’t equal intelligence, so a smaller brain doesn’t necessarily mean a less capable one. Staying mentally active, exercising, and eating brain-boosting foods can help keep it in top shape!

Image: Lisa Yount

We often think of cholesterol as bad, but your brain actually depends on it! In fact, 25% of your body’s cholesterol is stored in your brain, where it helps with learning and memory. However, unlike other organs, the brain can’t absorb cholesterol from the blood, it has to produce its own. So, while too much cholesterol in the body can be harmful, the right amount is vital for brain function. At least you can use that as an excuse to get that burger!