Each entry on this list of common misconceptions is worded as a correction; the misconceptions themselves are implied rather than stated. These entries are concise summaries; the main subject articles can be consulted for more detail.
Common misconceptions are viewpoints or factoids that are often accepted as true, but which are actually false. They generally arise from conventional wisdom (such as old wives' tales), stereotypes, superstitions, fallacies, a misunderstanding of science, or the popularization of pseudoscience. Some common misconceptions are also considered to be urban legends, and they are sometimes involved in moral panics.
The cat, also referred to as the domestic cat or house cat, is a small domesticated carnivorous mammal. It is the only domesticated species of the family Felidae. Advances in archaeology and genetics have shown that the domestication of the cat occurred in the Near East around 7500 BC. It is commonly kept as a pet and farm cat, but also ranges freely as a feral cat avoiding human contact. Valued by humans for companionship and its ability to kill vermin, the cat's retractable claws are adapted to killing small prey such as mice and rats. It has a strong, flexible body, quick reflexes, and sharp teeth, and its night vision and sense of smell are well developed. It is a social species, but a solitary hunter and a crepuscular predator. Cat communication includes vocalizations—including meowing, purring, trilling, hissing, growling, and grunting—as well as body language. It can hear sounds too faint or too high in frequency for human ears, such as those made by small mammals. It secretes and perceives pheromones.
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Food is any substance consumed by an organism for nutritional support. Food is usually of plant, animal, or fungal origin and contains essential nutrients such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism and assimilated by the organism's cells to provide energy, maintain life, or stimulate growth. Different species of animals have different feeding behaviours that satisfy the needs of their metabolisms and have evolved to fill a specific ecological niche within specific geographical contexts.
Urban legends is a genre of folklore concerning stories about an unusual or humorous event that many people believe to be true but largely are not.
Mosquitoes, the Culicidae, are a family of small flies consisting of 3,600 species. The word mosquito is Spanish and Portuguese for little fly. Mosquitoes have a slender segmented body, one pair of wings, three pairs of long hair-like legs, and specialized, highly elongated, piercing-sucking mouthparts. All mosquitoes drink nectar from flowers; females of some species have in addition adapted to drink blood. The group diversified during the Cretaceous period. Evolutionary biologists view mosquitoes as micropredators, small animals that parasitise larger ones by drinking their blood without immediately killing them. Medical parasitologists view mosquitoes instead as vectors of disease, carrying protozoan parasites or bacterial or viral pathogens from one host to another.
Fever or pyrexia in humans is a symptom of an anti-infection defense mechanism that appears with body temperature exceeding the normal range due to an increase in the body's temperature set point in the hypothalamus. There is no single agreed-upon upper limit for normal temperature: sources use values ranging between 37.2 and 38.3 °C in humans.
Thomas Stephen Szasz was a Hungarian-American academic and psychiatrist. He served for most of his career as professor of psychiatry at the State University of New York Upstate Medical University. A distinguished lifetime fellow of the American Psychiatric Association and a life member of the American Psychoanalytic Association, he was best known as a social critic of the moral and scientific foundations of psychiatry, as what he saw as the social control aims of medicine in modern society, as well as scientism.
The MMR vaccine is a vaccine against measles, mumps, and rubella, abbreviated as MMR. The first dose is generally given to children around 9 months to 15 months of age, with a second dose at 15 months to 6 years of age, with at least four weeks between the doses. After two doses, 97% of people are protected against measles, 88% against mumps, and at least 97% against rubella. The vaccine is also recommended for those who do not have evidence of immunity, those with well-controlled HIV/AIDS, and within 72 hours of exposure to measles among those who are incompletely immunized. It is given by injection.
The G-spot, also called the Gräfenberg spot, is characterized as an erogenous area of the vagina that, when stimulated, may lead to strong sexual arousal, powerful orgasms and potential female ejaculation. It is typically reported to be located 5–8 cm (2–3 in) up the front (anterior) vaginal wall between the vaginal opening and the urethra and is a sensitive area that may be part of the female prostate.
In human genetics, the Mitochondrial Eve is the matrilineal most recent common ancestor (MRCA) of all living humans. In other words, she is defined as the most recent woman from whom all living humans descend in an unbroken line purely through their mothers and through the mothers of those mothers, back until all lines converge on one woman.
Creatine is an organic compound with the nominal formula (H2N)(HN)CN(CH3)CH2CO2H. It exists in various tautomers in solutions. Creatine is found in vertebrates, where it facilitates recycling of adenosine triphosphate (ATP), primarily in muscle and brain tissue. Recycling is achieved by converting adenosine diphosphate (ADP) back to ATP via donation of phosphate groups. Creatine also acts as a buffer.
Snopes, formerly known as the Urban Legends Reference Pages, is a fact-checking website. It has been described as a "well-regarded reference for sorting out myths and rumors" on the Internet. The site has also been seen as a source for both validating and debunking urban legends and similar stories in American popular culture.
Humans or modern humans are the most common and widespread species of primate, and the last surviving species of the genus Homo and the broader australopithecine subtribe. They are great apes characterized by their hairlessness, bipedalism, and high intelligence. Humans have large brains, enabling more advanced cognitive skills that enable them to thrive and adapt in varied environments, develop highly complex tools, and form complex social structures and civilizations. Humans are highly social, with individual humans tending to belong to a multi-layered network of cooperating, distinct, or even competing social groups – from families and peer groups to corporations and political states. As such, social interactions between humans have established a wide variety of values, social norms, languages, and traditions, each of which bolsters human society. Humans are also highly curious, with the desire to understand and influence phenomena having motivated humanity's development of science, technology, philosophy, mythology, religion, and other frameworks of knowledge; humans also study themselves through such domains as anthropology, social science, history, psychology, and medicine. There are estimated to be more than eight billion living humans.
The neurodiversity paradigm is a framework for understanding human brain function that recognizes the diversity within sensory processing, motor abilities, social comfort, cognition, and focus as neurobiological differences. This diversity falls on a spectrum of neurocognitive differences. The neurodiversity paradigm argues that diversity in neurocognition is part of humanity and that some neurodivergences generally classified as disorders, such as autism, are differences and disabilities that are not necessarily pathological. Neurotypical individuals are those who fall within the average range of functioning and thinking.
The dog is a domesticated descendant of the wolf. Also called the domestic dog, it was selectively bred from an extinct population of wolves during the Late Pleistocene by hunter-gatherers. The dog was the first species to be domesticated by humans, over 14,000 years ago and before the development of agriculture. Experts estimate that due to their long association with humans, dogs have gained the ability to thrive on a starch-rich diet that would be inadequate for other canids.
The human immunodeficiency virus (HIV) is a retrovirus that attacks the immune system. It is a preventable disease. There is no vaccine or cure for HIV. It can be managed with treatment and become a manageable chronic health condition. While there is no cure or vaccine, antiretroviral treatment can slow the course of the disease and enable people living with HIV to lead long and healthy lives. An HIV-positive person on treatment can expect to live a normal life, and die with the virus, not of it. Effective treatment for HIV-positive people involves a life-long regimen of medicine to suppress the virus, making the viral load undetectable. Without treatment it can lead to a spectrum of conditions including acquired immunodeficiency syndrome (AIDS).
Many urban legends and misconceptions about drugs have been created and circulated among young people and the general public, with varying degrees of veracity. These are commonly repeated by organizations which oppose all classified drug use, often causing the true effects and dangers of drugs to be misunderstood and less scrutinized. The most common subjects of such false beliefs are LSD, cannabis, and PCP. These misconceptions include misinformation about adulterants or other black market issues, as well as alleged effects of the pure substances.
The 27 Club is an informal list consisting mostly of popular musicians, often expanded by artists, actors, and other celebrities who died at age 27. Although the claim of a "statistical spike" for the death of musicians at that age has been refuted by scientific research, it remains a common cultural conception that the phenomenon exists, with many celebrities who die at 27 noted for their high-risk lifestyles.
Animal suicide is when an animal intentionally ends its own life through its actions. It implies a wide range of higher cognitive capacities that experts have been wary to ascribe to nonhuman animals such as a concept of self, death, and future intention. There is currently not enough empirical data on the subject for there to be a consensus among experts. For these reasons, the occurrence of animal suicide is controversial among academics.
On the other hand, the movie was not widely successful, and appealed to a small portion of the population. It was strictly for a Buenos Aires audience: nobody in the provinces even saw it because it was not distributed there. And likewise, given the subject, it was not possible to export the film to other nations, not even to a close cousin similar to Uruguay.
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: CS1 maint: DOI inactive as of November 2024 (link)The "Twinkie defense" is so ingrained in our culture that it appears in law dictionaries, in sociology textbooks, in college exams and in more than 2, 800 references on Google. Only a few of them call it what it is: a myth.
"Twinkie defense" is now a widespread and commonly-recognized term. It is also a term based on something that never happened.
All dictionaries now recognize "a Frankenstein" as any monstrous creation that threatens to destroy its creator.
Today this ubiquitous usage must be accepted as standard
This piece bears an erroneous nickname since the story long associated with this nickname presumes the pianist is supposed to play the piece in one minute. The word "minute" means small or little waltz.
Based on the contents of the papyri, Tallet believes that at least some workers in the time of Khufu were highly skilled and well rewarded for their labor, contradicting the popular notion that the Great Pyramid was built by masses of oppressed slaves.
Herodotus claimed that the Great Pyramid at Giza was built with the labour of 100,000 slaves working in three-monthly shifts, a charge that cannot be substantiated. Much of the non-skilled labour on the pyramids was undertaken by peasants working during the Inundation season when they could not farm their lands. In return for their services they were given rations of food, a welcome addition to the family diet.
"...popular associations of the eruption with a legend of Atlantis should be dismissed...nor is there good evidence to suggest that the eruption...brought about the collapse of Minoan Crete
Marinatos (1939) famously suggested that the eruption might even have caused the destruction of Minoan Crete (also Page 1970). Although this simple hypothesis has been negated by the findings of excavation and other research since the late 1960s... which demonstrate that the eruption occurred late in the Late Minoan IA ceramic period, whereas the destructions of the Cretan palaces and so on are some time subsequent (late in the following Late Minoan IB ceramic period)
In a battle situation, horns on a helmet would get in the way.
The only other map or globe on which this specific phrase appears is what can arguably be called the egg's twin: the copper Hunt-Lenox Globe, dated around 1510 and housed by the Rare Book Division of the New York Public Library.
"Skinhead" was a term originally used to describe a 1960s British working-class subculture that revolved around fashion and music and that would heavily inspire the punk rock scene. While it has harmless roots, the skinhead movement fell into polemic politics. Nowadays, it's popularly associated with neo-Nazis, despite having split demographics of far-right, far-left, and apolitical.
Arnold described the shiny objects as 'something like a pie plate that was cut in half with a sort of a convex triangle in the rear' and that they flew 'like a saucer if you skipped it across the water.' The term 'flying saucer' made it into a newspaper headline and the rest, as they say, is history.
For example, Pruitt-Igoe is often cited as an AIA-award recipient, but the project never won any architectural awards.
Though it is commonly accorded the epithet 'award-winning,"' Pruitt-Igoe never won any kind of architectural prize. An earlier St. Louis housing project by the same team of architects, the John Cochran Garden Apartments, did win two architectural awards. At some point this prize seems to have been incorrectly attributed to Pruitt-Igoe
A pair of woman's eyelasses, a towel, a pair of shorts, packets of unopened Flavor-Aid lie scattered about waiting for the final cleanup that may one day return Jonestown to the tidy, if overcrowded, little community it once was.
An astronaut orbiting Earth in a spacecraft experiences a condition of weightlessness because both the spacecraft and the astronaut are in free fall.
Mythbusting: Popular myths about the African elephant... Myth: Elephants go to elephant graveyards to die
In the wild, rabbits aren't in the habit of digging up root vegetables such as carrots, potatoes and beets. They much prefer wild greens, such as grasses and clover. In fact, carrots may actually be bad for rabbits, because although the vegetables are high in good nutrients, including beta carotene, they are also relatively high in sugar. This means that feeding a rabbit lots of carrots could lead to tooth decay or other health issues.
Only American frogs are said to go "ribbit," and that's believed to be because early Hollywood producers used the ribbiting sound of the Pacific tree frog during night scenes.
a 1934 book by entomologist Antoine Magnan... refers to a calculation by his assistant André Sainte-Laguë, who was an engineer. The conclusion was presumably based on the fact that the maximum possible lift produced by aircraft wings as small as a bumblebee's wings and traveling as slowly as a bee in flight would be much less than the weight of a bee.
It is known that carnivorous plants can survive without catching prey.
Dinural E-W oscillations of the heads occurred initially but ceased as the flowers opened and anthesis commenced, leaving the heads facing east
One of the best-known fallacies in ECONOMICS is the notion that there is a fixed amount of work to be done – a lump of LABOUR – which can be shared out in different ways to create fewer or more jobs...
Fact: Lightning often strikes the same place repeatedly, especially if it's a tall, pointy, isolated object. The Empire State Building is hit an average of 23 times a year
Although many people might think that males have fewer ribs than females — most likely sparked by the biblical story of Adam and Eve — there is no factual evidence.
[...T]here's little evidence that detox diets actually remove toxins from the body. Indeed, the kidneys and liver are generally quite effective at filtering and eliminating most ingested toxins.
Most parents assume that children plus sugary foods equals raucous and uncontrollable behaviour. ... according to nutrition experts, the belief that children experience a 'sugar high' is a myth.
Few studies have reported the health benefits of vegan diets and therefore no conclusive evidence can be proposed
All published scientific data point to the fact that the G-spot does not exist...
Many people believe that dandruff is caused by poor hygiene, but this is not true.
It's often associated with poor hygiene, but that's a misconception—no one's really sure what causes it.
Dandruff is not caused by poor hygiene, although it may be more obvious if you do not wash your hair regularly.
Part of the process of becoming a mathematics writer is, it appears, learning that you cannot refer to the golden ratio without following the first mention by a phrase that goes something like 'which the ancient Greeks and others believed to have divine and mystical properties.' Almost as compulsive is the urge to add a second factoid along the lines of 'Leonardo Da Vinci believed that the human form displays the golden ratio.' There is not a shred of evidence to back up either claim, and every reason to assume they are both false. Yet both claims, along with various others in a similar vein, live on.
Bernoulli's Principle states that faster moving air has lower pressure... You can demonstrate Bernoulli's Principle by blowing over a piece of paper held horizontally across your lips."
If the lift in figure A were caused by "Bernoulli principle," then the paper in figure B should droop further when air is blown beneath it. However, as shown, it raises when the upward pressure gradient in downward-curving flow adds to atmospheric pressure at the paper lower surface.
...air does not have a reduced lateral pressure (or static pressure...) simply because it is caused to move, the static pressure of free air does not decrease as the speed of the air increases, it misunderstanding Bernoulli's principle to suggest that this is what it tells us, and the behavior of the curved paper is explained by other reasoning than Bernoulli's principle. ... An explanation based on Bernoulli's principle is not applicable to this situation, because this principle has nothing to say about the interaction of air masses having different speeds... Also, while Bernoulli's principle allows us to compare fluid speeds and pressures along a single streamline and... along two different streamlines that originate under identical fluid conditions, using Bernoulli's principle to compare the air above and below the curved paper in Figure 1 is nonsensical; in this case, there aren't any streamlines at all below the paper!
...if a streamline is curved, there must be a pressure gradient across the streamline, with the pressure increasing in the direction away from the centre of curvature.
The curved paper turns the stream of air downward, and this action produces the lift reaction that lifts the paper.
The curved surface of the tongue creates unequal air pressure and a lifting action. ... Lift is caused by air moving over a curved surface.
Demonstrations" of Bernoulli's principle are often given as demonstrations of the physics of lift. They are truly demonstrations of lift, but certainly not of Bernoulli's principle.
As an example, take the misleading experiment most often used to "demonstrate" Bernoulli's principle. Hold a piece of paper so that it curves over your finger, then blow across the top. The paper will rise. However most people do not realize that the paper would NOT rise if it was flat, even though you are blowing air across the top of it at a furious rate. Bernoulli's principle does not apply directly in this case. This is because the air on the two sides of the paper did not start out from the same source. The air on the bottom is ambient air from the room, but the air on the top came from your mouth where you actually increased its speed without decreasing its pressure by forcing it out of your mouth. As a result the air on both sides of the flat paper actually has the same pressure, even though the air on the top is moving faster. The reason that a curved piece of paper does rise is that the air from your mouth speeds up even more as it follows the curve of the paper, which in turn lowers the pressure according to Bernoulli.
Pressure melting cannot be responsible for the low friction of ice. The pressure needed to reach the melting temperature is above the compressive failure stress..."
According to the frequently cited — if incorrect — explanation of why ice is slippery under an ice skate, the pressure exerted along the blade lowers the melting temperature of the top layer of ice, the ice melts and the blade glides on a thin layer of water that refreezes to ice as soon as the blade passes... But the explanation fails... because the pressure-melting effect is small.
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: CS1 maint: multiple names: authors list (link)Some abilities peak and begin to decline around high school graduation; some abilities plateau in early adulthood, beginning to decline in subjects' 30s; and still others do not peak until subjects reach their 40s or later. These findings motivate a nuanced theory of maturation and age-related decline, in which multiple, dissociable factors differentially affect different domains of cognition.b. Matthews, MEelissa (March 19, 2019). "People's Brains Don't Reach Adulthood Until Age 30, Study Finds". Men's Health.
What we're really saying is that to have a definition of when you move from childhood to adulthood looks increasingly absurd... It's a much more nuanced transition that takes place over three decades.
It's the old myth heard time and again about how people use only ten percent of their brains
It is important to recognize that the potassium content of the body is under strict homeostatic control and is not influenced by variations in environmental levels. For this reason, the dose from 40K in the body is constant.