Debunking popular myths

Science exposed: The 10 senses you didn't know you had

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Contrary to popular belief, our body is capable of perceiving a lot more than what sight, smell, taste, hearing, and touch have to offer. Scientists studying perception have discovered at least 30 senses in addition to the five described by Aristotle more than 2,000 years ago. These complementary senses are called interoceptors, since they allow us to recognize and feel our inner sensations. Join us to learn about 10 senses you didn't know you had!

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Kinaesthesia is a sense that allows us to perceive the position, movement, and state of our body, internal and external. In our daily activities, we hardly notice it, but it’s there, working for us all the time.

This process is, in turn, subdivided into two senses: proprioception —the perception of our body in the space around us— and interoception —the perception of our internal organs. But we will look into these two in more detail below.

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Proprioception is the ability to perceive the position and movement of our limbs and torso, which allows us to control our body during daily activities. It is, in turn, the innate ability to discern the position and movement of body parts independently of visual information.

This faculty involves an intricate interplay between muscle memory, spatial awareness, and feedback from muscles and joints. It is fundamental to perform complex movements with precision. Thanks to proprioception, you can tell where your different body parts are located, even if your eyes are closed or you are not looking at your body.

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Interoception is the ability to sense our organism, providing information about the functioning or dysfunction of the internal organs. Although often underestimated, interoception is vital for survival: it helps us to maintain body balance and allows us to perceive when we are injured, when something is wrong with our body, when we need more oxygen, or to eat or drink water.

Interoceptive receptors are distributed throughout the body, usually in all the major organs and blood vessels. However, not all people's interoceptive receptors function correctly, which can cause different problems. These alterations can be due to excess or deficit; there may be a hypersensitivity that causes the interoceptive receptors to be activated with little stimulation, or they may not be triggered at all.

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This one's tricky. It is hard to define because it is a more abstract sense. In appearance, it is similar to interoception and proprioception, but it is a bit more complex. Cenesthesia is described as the awareness of being alive, the sensation of well-being or feeling sick. It is the name given to the singular set of sensations that an individual possesses of his or her own body.

In other words, everyone feels different: this unique and intangible experience of the inner self is cenesthesia.

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Nociception is a neural process by which the body handles potentially harmful stimuli against body tissues. The term was coined by the British neurophysiologist Charles Scott Sherrington to describe the physiological process of pain. It derives from the Latin nocere, meaning "to damage".

This mechanism is crucial to protect the organism, as it allows us to identify and react to external injuries or aggressions. However, there are several disorders that can alter the way some people perceive pain.

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Thermoception is the ability to perceive temperature and is a critical sensory function. It relies on thermal receptors in the skin, which send signals to the brain through specific nerve fibers. These receptors respond to different temperature ranges, allowing us to distinguish between cold, hot, and neutral temperatures.

Thermoception also allows us to adapt to different temperatures. But this ability varies from person to person. People sense temperature changes differently due to factors such as age, lifestyle habits, and health problems. In fact, some people with certain medical conditions like diabetes or Parkinson's, for example, may have difficulty sensing and reacting to temperature changes.

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As its name suggests, equilibrioception is the sense of balance and is one of the most important physiological senses. Basically, it is the sense that gives us spatial awareness and allows us to walk without falling. It involves the visual system and the vestibular system through the inner ear.

In humans, balance develops during the first years of life and begins to decline in old age. Some animals have this sense more developed than humans; for example, cats can walk and keep their balance on very narrow surfaces using their inner ears and tails without falling.

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Our perception of time is a complex and multifaceted phenomenon, deeply rooted in the brain’s neurological processes. This intricate sense, called chronoception, is not just a passive recording of events, but an active construction of temporal experiences.

There are no "time receptors" in the body, so it’s not a traditional sense. Chronoception is a sophisticated cognitive and emotional process that not only has a neurological basis but also a psychological dimension influenced by age, culture, biological rhythms, and temporal illusions.

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Simply put, baresthesia is the sense responsible for detecting pressure changes in the body. This function is carried out by specialized receptors located primarily in the skin, muscles, joints, and other tissues.

Baresthesia is essential for the regulation of balance, posture, and proper interaction with the environment. Alterations related to this sense are associated with several medical conditions, including spinal cord injuries, strokes, and degenerative disorders, among others.

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Not all human beings have developed this sense. It refers to the perception of smells when listening to music, or even smelling and tasting colors. In other words, it is the joint perception or interference of several types of feelings from different senses in the same perceptive act.

A synaesthete can, for example, hear colors, see sounds, or perceive taste when touching an object with a certain texture.

Well, actually…

They never said that: 12 popular misquotes

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Popular quotes are a good way to condense the ideas of a famous figure or to quickly make a reference to our favorite film or book. But we might not realize that many phrases embedded in society’s collective memory are actually misquotes or that they are wrongly attributed to someone. These are 12 examples of popular misquotes.

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If you were to ask who said this phrase, most people would answer Marie Antoinette. However, that would be incorrect. The original phrase—_"Qu'ils mangent de la brioche,"_ or _"Let them eat brioche"_—was attributed by Jean-Jacques Rousseau in his Confessions to an unnamed princess. How do we know it wasn’t Marie Antoinette? She was only nine years old at the time and still living in Austria.

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Darth Vader’s most quoted line never existed in that form. In The Empire Strikes Back, Luke accuses Darth Vader of murdering his father, based on what Obi-Wan Kenobi told him. Darth Vader’s actual response—_"No, I am your father"_—has since lived on as a misquote in the collective memory.

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Historians disagree about the last words spoken by Julius Caesar. Some say he remained silent after an initial cry of surprise, while others report that he spoke in Greek to his friend Brutus, saying Καὶ σύ, τέκνον ("You too, child"). The famous _"Et tu, Brute?"_—which can be translated as "And you?" or "You too, Brutus?"—first appeared in Caesar Interfectus by Richard Edes, but was later popularized by William Shakespeare’s Julius Caesar.

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While this phrase is often associated with Niccolò Machiavelli’s ideology, he never actually said it. In his works, Machiavelli argued that rulers might sometimes need to resort to questionable means to ensure the greater good. He emphasized that one can never fully know a person’s intentions, so it is better to judge them by the results of their actions.

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According to legend, while on trial for teaching heliocentrism—at the time not scientifically proven and considered contrary to biblical teaching—Galileo Galilei famously declared "E pur si muove!" ("And yet it moves!"), meaning that the universe does not bend to belief. Although the phrase is attributed to Galileo, it was first recorded at least a century after his death, with no evidence of it being veridical.

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Casablanca is one of the undisputed classics of cinematic history, and it has frequently been quoted and used as inspiration. However, one of its most famous phrases—"Play it again, Sam"—is actually a misquote. Ingrid Bergman’s character says both "lay it once, Sam, for old times’ sake" and "Play it, Sam. Play ‘As Time Goes By’" but the misquote became popular after Woody Allen’s play, later adapted into the film Play It Again, Sam.

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This lovely quote, often attributed to Mahatma Gandhi, is another example of a phrase mistakenly linked to a famous figure. Gandhi expressed a similar sentiment in his writings—the idea that change must begin with oneself—but the exact wording is not his. The phrase is more accurately attributed to Arleen Lorrance, a 1970s educator.

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In the early 20th century, Evelyn Beatrice Hall published The Friends of Voltaire, a biography of the French philosopher. In it, as a way to illustrate Voltaire’s beliefs on freedom of speech, she penned the phrase: "I disapprove of what you say, but I will defend to the death your right to say it." The maxim was such a good synopsis of Voltairian ideals that most people came to believe it was a direct quote from him.

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On April 13, 1970, the Apollo 13 spacecraft had to abort its mission due to the explosion of an oxygen tank. Astronaut Jack Swigert first reported the issue with the words: "Okay, Houston, we’ve had a problem here." Jim Lovell later repeated, "Houston, we’ve had a problem." How did the misquote become so popular? In the 1995 film Apollo 13, the screenwriter thought the past tense was not dramatic enough, and he changed it to "we have a problem."

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One could argue that this phrase is one of the quintessential Sherlock Holmes sayings. But did you know it wasn’t written by Arthur Conan Doyle? Sherlock Holmes does call his companion "my dear Watson," and he uses the word "elementary" when describing his deductions, but the full phrase —"Elementary, my dear Watson"— first appeared in a 1899 stage play and was later popularized by Basil Rathbone’s film adaptations.

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Real Trekkies know that this phrase, though popular, was never actually spoken by Captain Kirk in the original Star Trek series. He did say similar lines, such as "Mr. Scott, beam us up," and other variants. The misquote became so popular that it entered popular culture as a saying of its own.

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Some could argue that the Bible is the most misquoted book of all time. This particular phrase, often cited from Paul’s first letter to Timothy, is used to criticize money, but most people don’t realize that it is only a partial quote. The full passage—"For the love of money is the root of all evil"—warns against the dangers of loving money excessively.