The life cycle of a banana is a colorful one—it starts with a deep green, changes to a delicious yellow, and ends (if it’s not eaten beforehand) at an unappetizing brown. But what causes this color change, and what makes a banana go from green all the way to the dark side? As it turns out, bananas

Baseball players chew gum to help them maintain focus and stay relaxed during games. Players have described the practice as soothing and helpful in reducing stress and anxiety during the prolonged waiting periods characteristic of baseball. Chewing gum is also woven into players’ personal routines

Bats sleep upside down because their anatomy and physiology are adapted for this position. Their legs are slender and not built for walking or standing, but their feet are adapted to grasp and hold onto surfaces. When a bat hangs upside down, its body weight utilizes a tendon-locking mechanism that

Beavers are quite the clever architects when it comes to safeguarding their homes. They build dams to raise the water depth around their lodges—their dome-shaped homes made of sticks and mud. This deeper water acts as a natural barrier, making it challenging for predators to access their lodges. It

Most of what we hear as buzzing from bees is due to the rapid beating of their tiny wings. Some bees beat their wings a mind-blowing 230 times a second, generating quite the buzz. This is also mostly why we hear buzzing sounds from flies, wasps, and various other fast-flying insects. In addition,

Birds chirp at night for various reasons, primarily to communicate, mark territory, attract mates, warn other birds of potential predators, or signal the presence of food. For instance, owls hoot to establish and defend their territory, especially during breeding season, when they are more

In many societies the color white has long been associated with purity and virtue, and that is one reason why some brides choose to wear white, especially in the West. More often than not, though, you will hear claims that brides wear white because “it’s tradition.” But, historically, white was not

A common Lenten tradition in many Roman Catholic communities is the Friday fish fry: deep-fried fish dinners usually served with chips (or “french fries,” if you must). Although the tradition has some basis in doctrine, technically the Roman Catholic Church does not require its followers to eat

Mary, the mother of Jesus, is venerated by Roman Catholics and Orthodox Christians because they view her as a significant intercessor and a spiritual mother in their faith. In Roman Catholic belief, Mary holds a special place in heaven and serves as someone who intercedes on behalf of all sinners

Cats blink slowly as a form of nonverbal communication, often interpreted as a sign of trust and affection toward humans or other animals. Cats are naturally cautious creatures, and in the wild they need to be alert to potential threats. So when they close their eyes, even momentarily, it shows

Cats clean themselves frequently because of a combination of health benefits and social behaviors. Cats are meticulous groomers. They can spend up to 50 percent of their waking hours cleaning themselves with their tongues, which have barb-like spines. By grooming, cats remove dirt, dust, dead skin

An aversion to water is one of the most well-known characteristics of household cats. However, this isn’t true of all felines. Some large cats, such as tigers, commonly take a dip to cool off or hunt prey, and even some domesticated breeds are known to enjoy a swim when the opportunity arises. In

Cats have slit pupils primarily to enhance their ability to see in varying light conditions. They are crepuscular creatures, meaning they are most active during dawn and dusk. This crucial adaptation helps them to explore in low-light environments. The pupils of the eyes expand or contract

Cats have whiskers primarily for tactile sensing, which is crucial for their survival and daily activities. Whiskers, or vibrissae, are specialized hairs that serve as touch receptors for cats. These stiff hairs, located on the face and at the back of the forelegs, are highly sensitive to touch and

Cats often seek out boxes because the confined space makes them feel protected and sheltered. By nature cats seek out small, confined spaces where they can hide from potential threats. This behavior stems from their instincts shaped in the wild, where staying out of sight helps them avoid predators

The aromatic leaves of the catnip (Nepeta cataria), a herb of the mint family, are known to be particularly exciting to cats. The secret to catnip’s allure lies in the volatile oil known as nepetalactone, which has a psychoactive quality. This compound is found in the leaves and stems of the catnip

Cats are naturally inclined to use scratching posts because it fulfills several instinctual needs and behaviors. Cats claw at trees and other objects in the natural environment to leave visible marks and traces of their scent, thus establishing their area or domain. The scent glands on the

Cats often open their mouths after smelling something because of a behavior known as the flehmen response. It’s a behavior seen in many mammals, where they open their mouths and curl back their lips after detecting an interesting smell. Cats rely heavily on chemical communication, and the flehmen

While purring is often associated with a cat’s contentment, such as when they are being petted or snuggled up in a cozy spot, it can also occur in less happy circumstances. Cats may purr when they are frightened, in pain, or when they are sick. This suggests that cats may purr to sooth themselves,

Cats rub against your legs primarily as a form of communication and marking behavior. Rubbing against you may serve as a sign of affection or a greeting; it is also a means of marking you as part of the cat’s territory or social group. Such marking involves the transfer of the cat’s own scent from

Cat person? How many pictures of your cat sleeping have you got on your phone? A lot, right? They are so cute when they sleep…so cute. But then they are always asleep. Okay, not always, but a lot of the time. Why is that? The truth is that cats sleep an average of 15 hours per day. Some of them

A clown’s red nose is often noticed before anything else. Far from being a simple decorative decision, it is a visual signal shaped by circus history and performance needs, telling the audience that comic disorder is about to begin. The red nose is closely associated with the auguste, a low-comedy

Coyotes make a number of different vocalizations, some of which sound like human screams. These sounds—including yips, barks, and howls—are crucial for communication and are made for a variety of reasons. Coyote howls, which perhaps are the most scream-like noise the animal makes, are believed to

There are two aspects to this question. The first concerns the mechanics of crab motion—the how—which evolutionary biologists call a proximate question. The second concerns the function of crab motion—the why—which evolutionary biologists call an ultimate question. Before delving into why crabs

Male crickets are musical insects, chirping to establish their territory and to attract mates. Their chirping sounds are produced by rubbing a scraper on one forewing along a row of teeth on the opposite forewing, an act known as stridulation. Different songs serve different purposes, with many

Deer freeze in headlights primarily because of their unique vision and instincts. As crepuscular animals, their eyes are adapted for the low-light conditions of dusk and dawn and fully dilate to capture all available light in such situations. This adaptation, however, makes them more sensitive to

Deer shed their antlers as part of hormonal changes linked to their survival and mating season. In all but one species of deer, males carry antlers; in the reindeer (Rangifer tarandus), both sexes carry antlers. Antlers are not permanent appendages; they are shed and regrown annually. As the mating

There may be several reasons why dogs turn around several times before they lie down. Since dogs are intelligent mammals with varying emotional states and levels of awareness, the behavior of circling before lying down may depend on the individual dog and its situation. According to many sources,

Dogs eat grass for several reasons, and while the exact motivations can vary, there are a few common theories that help explain this behavior. One reason dogs might munch on grass is to fulfill certain nutritional needs. Dogs are known to eat a variety of foods, and when their diet lacks certain

Though poop is certainly not a staple food for any human, it may come as no surprise that poop is a common part of many a dog’s diet. While a dog eating poop may not be entirely shocking—in fact, an estimated 16 percent of domesticated dogs eat poop—it may still be puzzling. And though dogs can

Dogs have wet noses mainly to enhance their sense of smell. The moisture on the nose traps scent particles in the air, making it easier to detect and process smells. A dog’s ability to detect scents plays a crucial role in how they explore and understand its surroundings. A dog’s nose is far more

Dogs are naturally inclined to like bones due to their evolutionary history and biological needs. Dogs have evolved from wolves, and their ancestors relied heavily on bones as a food source. Wolves and early dogs would chew on bones to reach the marrow within. Marrow is a nutrient-rich, gelatinous

Dogs enjoy playing fetch because of a combination of instinctual behaviors, physical exercise needs, and the joy of human interaction. Fetch engages a dog’s natural instincts, especially in breeds that were originally bred for retrieving and herding. Dogs such as Golden Retrievers and Labrador

Dogs wag their tails primarily as a form of communication, allowing them to express a range of emotions. Tail wagging in dogs is a complex behavior that allows them to convey happiness, excitement, or even nervousness to other dogs or humans. The nature of the emotion can often be determined by the

Filipinos commonly bear Spanish surnames as a result of a colonial administrative reform introduced in 1849, when the Philippines was under Spanish colonial rule. The reform, implemented by Governor-General Narciso Clavería and known as the Clavería Decree, mandated the adoption of standardized

Resplendent in bright pink feathers (the result of a diet rich in larvae, algae, and shrimp), flamingos are among nature’s most beautiful birds—and the strangest. They eat with their heads upside down, sleep with their heads on their backs, and often rest by standing for long periods on one leg.

The long neck of a giraffe (genus Giraffa) is a classic example of adaptation, which is the process by which a species becomes better suited to its environment. Giraffes use their long necks to browse foliage that is as high as six meters (20 feet) off the ground, primarily from thorny acacia

Chest beating is a powerful tool in the gorilla’s communication arsenal. Both males and females engage in this behavior, but it is more pronounced in males due to their larger size and the presence of air sacs in the chest and throat that enhance the sound. When a gorilla beats its chest it is

Gray hairs are indeed unusual, and not only because of their color. Gray hair is stiffer and more wiry than hair rich in pigment. Exactly why this is the case is not fully understood. Gray hair has reduced levels of melanin, which is the pigment that gives hair and skin its color. Within the hair

Horseshoes protect hooves from cracking or wearing down on rough surfaces. When horses walk on such terrains, their hooves can break or split open. The U-shaped metal plate of a horseshoe helps to prevent this wear, ensuring that the hooves remain intact and healthy over time. This is particularly

Horses roll for a variety of reasons, each serving a distinct purpose in their daily lives and well-being. One of the primary reasons horses roll is to groom themselves. Rolling helps them remove dirt, loose hair, and parasites from their coat. This natural grooming behavior is essential for

Some consider this a trick question. That’s because horses actually doze while on their feet and lie down for REM sleep. So, the better question is: Why do horses nap while standing? Mainly because sleeping while lying down can be dangerous. It takes a bit of work for horses to get up, which makes

Horses wear blinders to limit their field of vision, which helps them focus on what is directly ahead. Blinders, also known as blinkers, are small leather pieces attached to a horse’s bridle. They are strategically placed on either side of the horse’s head, next to its eyes, to restrict peripheral

Eyebrows are an often overlooked feature of the face. Without much fanfare they automatically do their job of protecting the eyes from the glare of the sun and from small hazards like dust, dirt, sweat, and rain. Eyebrows act as a barrier, diverting moisture away from the eyes toward the sides of

If you think about it, a large part of what makes us human is water doing its job quietly in the background. About 60 percent of your body is water. That means more than half of “you” is just…H2O. So when people say, “Drink more water,” they’re not simply being annoying; they’re also reminding you

Coins? Matches? Lipstick? Flash drives? Gold nuggets? The tiny pocket on jeans likely has been used for all of these, even the last (more on that in minute). But, as designed by Levi Strauss and Jacob Davis in 1873 as a feature of the original “waist overalls,” the small pocket was intended to hold

Jews place stones on graves of the dead as a sign of respect and remembrance for the people buried below. In Judaism placing stones on graves serves as a symbol of the lasting memory and enduring presence of the deceased in the lives of their loved ones. The stones also indicate that a grave has

Kangaroos “hug” as a defensive tactic to stabilize themselves while fighting other kangaroos for dominance during mating season. When not scratching at their opponents’ eyes, kangaroos grip each other with their agile arms in what looks like a hug in order to balance themselves as they use their

How would it feel to be the last person on Earth who speaks your language? For those of us whose native languages have millions of speakers, it’s almost impossible to imagine. And yet languages have come and gone throughout human history, and they continue to do so. Linguists estimate that of the

Green leaves get their color from the photosynthetic pigment chlorophyll. When deciduous leaves are preparing to separate from the tree in autumn, that green pigment begins to break down. This can then reveal other leaf pigments that were masked by the green, such as yellow and orange carotenoids.

In many places around the world, autumn is marked by the slow, beautiful change of green foliage to vibrant reds, oranges, yellows, and purples. Green leaves appear green because of the presence of the pigment chlorophyll, which is key to photosynthesis. In temperate regions, cold winters pose a

In temperate regions of the world, autumn is marked by the brightly colored foliage that slowly drops from trees and shrubs to carpet the ground. But why do some plants shed their leaves before winter? It turns out autumnal leaf drop is a form of self-protection. While evergreen plants in cold

Lions roar to proclaim their territory and to assert dominance. This vocalization is particularly important for male lions, who use it to signal their presence and deter rival males from encroaching on their domain. By doing so, they help maintain the pride’s territory and safety. Their distinctive

Llamas spit for a number of reasons. When a llama feels threatened, it might spit to protect itself or to maintain its position within the group. During mating season, males spit at each other when fighting over females, who might spit at a male to stop his advances. Sometimes llamas spit when they

Female mosquitoes drink blood to produce viable eggs. The proteins and iron in blood are essential for mosquito egg maturation, meaning that a blood meal is a crucial part of their reproductive cycle. Different species of mosquitoes show host preferences and, in many cases, have narrow restrictions

The savory smell. The crunchy bite. The salty kick. The buttery finish. Americans will recognize the smell and flavor of their favorite moviegoing snack anywhere. Why is it that we feast our taste buds on these crisp kernels while our eyes feast on the big screen? A few converging aspects made

Oarfish swim vertically to camouflage themselves in their deep-water habitat. This orientation hides their flattened bodies from predators above, and their reflective silver flesh blends into the color of the water around them in the low light of the depths. Swimming vertically also has other

You’re happily chopping onions for your dinner when BAM! Your eyes are stinging, and tears are running down your face. Maybe the burning gets so bad you have to step away! Why are onions such jerks sometimes? Well, it actually comes down to some pretty fascinating biochemistry. Before it found its

When it comes to eyes and ears, pairs make sense. Paired eyes give us stereo vision, which allows us to see objects in depth, and paired ears give us stereo hearing, which allows us to detect the direction a sound is coming from. The reason for paired nostrils, however, is a little less obvious.

The eerie hooting of an owl, sometimes linked to the supernatural by humans, serves a number of purposes in the nocturnal bird’s natural environment, including marking territory and attracting mates. Owl vocalizations can be quite diverse, with different pitches and rhythms that are unique to each

Parrots talk primarily because of their advanced vocal learning abilities, which allow them to mimic sounds, including human speech. Parrots possess an ability known as vocal learning, which enables them to imitate a wide range of sounds. This skill is not limited to parrots—it is also found in

People blush mainly in response to emotions such as embarrassment, shame, or confusion. When someone feels these emotions, the body reacts by sending more blood to the face, which causes the cheeks to turn red. This physiological response is induced by the body’s sympathetic nervous system, which

According to what seems to have become a somewhat standardized history, the collision of milk and cereal dates to about the 1860s (or perhaps the 1870s), when a breakfast cereal predecessor called granula came into being. Eating granula dry, as Mental Floss succinctly describes it, “was like trying

Every year on St. Patrick’s Day, Americans of all backgrounds celebrate Ireland’s patron saint by eating corned beef and cabbage. The culinary pairing is as much a holiday tradition as parades, Guinness, and the color green. Understandably, many people assume that this food tradition comes from

Every Christmas season, sprigs of mistletoe become an unlikely symbol of romance, particularly in the United States and the United Kingdom. A small bouquet of mistletoe, usually hung from a doorway or other location, beckons couples to exchange a quick kiss—an oddly tender custom for a plant that

According to Merriam-Webster, the interjection amen is "used to express solemn ratification (as of an expression of faith) or hearty approval (as of an assertion)." It is often interchanged with phrases such as so be it. The original word in Hebrew bears relation to other words denoting security

Some people may throw salt over their shoulder in the belief that it wards off evil spirits or misfortune. This practice, commonly held to be a superstition, stems from the notion that spilling salt is unlucky and that the devil or other evil spirits reside on the left shoulder. Individuals who

You leave for work in the morning and your plant looks perfectly happy, but by the time you come home, it’s sad and droopy. So why do plants wilt? Usually because they are thirsty! Many nonwoody plants rely almost exclusively on water pressure, or turgor, within their cells to keep them erect.

Salmon are biologically programmed to die after spawning, a phenomenon known as semelparity. This is a reproductive strategy where an organism expends all its energy in a single, massive effort to reproduce. For Pacific salmon (Oncorhynchus), this means they invest everything into their journey

Biologists have identified and described millions of species on Earth, from towering redwoods to microscopic bacteria, and each one has a name that is clear, consistent, and recognized worldwide. To accomplish this, biology uses a standardized system known as binomial nomenclature to uniquely name

Despite misleading media reports suggesting that shark attacks are on the rise, such assaults on humans are exceedingly rare and even more rarely are fatal. While the number of recorded shark attacks has risen in recent years, the rate per capita has not. Our species is simply undergoing a massive

Skunks spray as a highly effective defense mechanism to deter predators and threats. They are equipped with two anal scent glands that are highly specialized and produce a potent, noxious liquid. Each scent gland has a nipple associated with it, which allows the skunk to aim the spray with

You open your lunch box to discover that the lovely apple you sliced this morning now appears unsightly and brown. Why does this happen? This unappetizing phenomenon is actually due to a chain of biochemical reactions known as “enzymatic browning.” When an apple is injured (or cut into pieces), the

Although a larger size normally indicates greater longevity among most mammals, dogs tend to follow a different pattern. Small dogs usually live longer than their larger counterparts due to a combination of genetic, physiological, and evolutionary factors. Genetic makeup plays a significant role in

As snakes grow, their skin does not grow with them. Instead, they periodically shed their outer layer of skin to accommodate their increasing size. This process, known as molting, or ecdysis, involves the formation of a new layer of skin beneath the old one. Once the new skin is ready, the old skin

The odds of a baby seahorse surviving to maturity are lower than 1 in 200. One of the main reasons for this low survival rate is that seahorse parents leave their offspring to fend for themselves immediately after birth, similar to most fish species. This means that baby seahorses are vulnerable to

The practice of sexual cannibalism may sound like a horrific piece of fiction, but in fact this occurs in the behavioral repertoires of several animals. It refers to the eating of all or part of one’s mate during courtship or copulation. This behavior can seem like an evolutionary puzzle: Why would

Certain animals hibernate because food supplies become scarce during the winter months. By going into a long deep sleep, they bypass this period completely, waking up when food becomes more plentiful. Bears are most commonly associated with hibernation (although they are not considered true

You already know why cicadas are so unbelievably noisy. But why do some of them appear aboveground only every 17 years? The 17-year cicadas are species of periodical cicadas, a group of hemipterans with the longest known insect life cycle. The largest brood makes its appearance every 17 years, like

You grumble as you grudgingly wipe the splattered spaghetti sauce or baked potato shrapnel from the inside of your microwave. What is it about these wonders of modern engineering that makes some foods more prone to exploding than other forms of cooking? Microwave ovens use microwave radiation (a

One of the best-known differences between British and American English is the fact that the sport known as football in Great Britain is usually called soccer in the United States. Because the sport originated in England, it is often assumed that soccer is an Americanism. In fact, the word is

Sphynx cats appear hairless because of a genetic mutation that occurred naturally in shorthaired cats and was later reinforced by generations of selective breeding. This mutation affects the development of hair follicles, leading to the absence of a typical fur coat. Contrary to popular belief,

Light emitted from stars does not actually twinkle but only appears to twinkle when viewed from Earth. As starlight passes through the different layers of Earth’s atmosphere, turbulence causes the starlight to bend. This distortion of the starlight makes the star appear as if twinkling. Technically

Imagine that you’re the creator and show runner of the newest hit comedy show on television. Only it isn’t a hit yet, and your live studio audience isn’t giving you the hearty laughs the show deserves. Do you film the show all over again, hoping that this time the audience will laugh? Or is there

The Wimbledon Championships are the oldest and most prestigious of the four tennis Grand Slam tournaments. (The other three are the Australian, French, and U.S. opens.) As such, Wimbledon is awash in long-lasting traditions and features, such as the habit of calling the men’s and women’s

The saying that cats have nine lives comes from a blend of cultural beliefs, historical anecdotes, and human observation of the remarkable physical abilities of cats themselves. In ancient Egypt, cats were revered as divine creatures and often associated with the goddess Bastet, who was believed to

Turtles are known for their long lifespans, with some species such as the Blanding’s turtle (Emydoidea blandingii) and the eastern box turtle (Terrapene carolina) living more than 30 years. Their ability to live so long comes from a mix of physical and biological traits. Turtles have evolved a

Vultures circle for various reasons, most related to locating food and conserving energy. They ride warm thermal updrafts, effortlessly gaining height without wasting energy. From these lofty vantage points, they survey the ground, sometimes gliding for several hours and covering vast stretches of

Aging is a complex process influenced by a combination of various factors, including genetics, our environment, and changes in our bodies over time. No single theory explains aging entirely, but some, such as the genetic theory and oxidative damage theories, offer detailed insights. The genetic

The jack-o’-lantern has a long history with Halloween, although our favorite demonic faces haven’t always been carved out of pumpkins. Their origin comes from an Irish myth about Stingy Jack, who tricked the Devil for his own monetary gain. When Jack died, God didn’t allow him into heaven, and the

Annual celebrations and commemorations came about with the invention of the calendar. Not much is known about the first birthday celebrations in history, in part because they are very ancient. The earliest ones we know about were for nobles, in which the celebration played a performative social

Did you know that parts of Halloween may have been around for more than a thousand years? What began as serious religious observances has morphed over centuries, becoming increasingly secular as the religious trappings all but disappeared. Today Halloween is a holiday of spooky fun characterized by

Juneteenth (also known as Emancipation Day, Freedom Day, and Jubilee Day) commemorates the end of slavery in the United States. It marks the anniversary of June 19, 1865, the day when Union soldiers arrived in Galveston, Texas, and informed the enslaved population of their freedom—more than two

“The Times Building will be especially illuminated to-night in honor of the birth of 1908,” announced The New York Times on December 31, 1907. “The exact moment of the New Year’s arrival will be signalized by the dropping of an electrically illuminated ball above the tower. The ball will be five

As celebrated in the United States, the holiday of Thanksgiving usually revolves around a bountiful meal. Typical dishes include bread stuffing, potatoes, cranberry sauce, pumpkin pie, and, above all, turkey. How did turkey become the centerpiece of this feast? It is often assumed that today’s

Of the many Valentine’s Day traditions, one of the most enduring is the classroom card exchange. Each year, typically, elementary school children choose a box of valentines featuring their latest favorite superhero, princess, snack, or Internet meme, fill out a card for each of their classmates,

Sticky, gooey, oftentimes orange, and homemade within the ears—earwax is considered a gross nuisance that people tend to frequently remove and clean from the body. Whether it’s by cotton swab, an ill-advised and dangerous method, or by an otolaryngologist, people go to great lengths for

Seasons occur due to the tilt of Earth’s axis, which is approximately 23.5°. Because of this tilt, each hemisphere receives different amounts of sunlight through the year. The Earth’s distance from the Sun, even though it changes slightly over a year, is not a factor in the change of seasons. When

We need to sleep, because it plays an important role in maintaining our overall health and well-being. Sleep gives the body time to heal and supports healthy growth. During sleep, hormone levels change and muscles relax, allowing tissues to heal and the body to build muscle and synthesize proteins

Thanksgiving is not a good time to be a turkey in the United States. But at least one of these otherwise hapless birds has reason to be thankful on this day, when it is saved from becoming the centerpiece of the feast by none other than the president of the United States. Though absent from the