Animal – Intriguing Facts

6 little-known facts about oysters

Arvyn Braich — Wed, 15 Oct 2025 14:10:41 +0000

Most people think that oysters are simply half-shells & hot sauce. But they’re wrong. These little shellfish have all kinds of quirks to them that scientists keep digging up, including things you’d never expect from something that sits on a rock. Here are six little-known facts about oysters. Which one did you find most surprising?

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Many oysters switch sex more than once

An oyster doesn’t have the same understanding of gender as humans do. Pacific oysters can switch back & forth between male and female a few times during their lives, and in one study, some even changed four times. Eastern oysters can do the same thing. They’ll usually start off as males when they’re young & change as they get older.

Oyster reefs are glued cities

You might’ve wondered how reefs of oysters don’t fall apart. Their secret? They have their own built-in glue, which works as a kind of special cement they can squirt out. It hardens underwater. According to scientists, it’s made from carbonate & proteins, and when you look at it under a microscope, it looks patchy. It’s almost like messy plasterwork.

Baby oysters rely on chemicals to pick a home

Baby oysters work hard to find exactly where to plop themselves down. In fact, they sniff out chemical signals in the water to decide where to settle, including things like L-DOPA & shell proteins. These tell them that it’s a good spot to call home. When baby oysters can’t find the right cue, they’ll just keep floating around until something feels right.

Oysters have their own “clocks”

While oysters have clocks, they’re not always on the same schedule as ours. Lab tests found that Pacific oysters switched from a normal 24-hour rhythm to a tidal one about every 12.4 hours. Essentially, they’re syncing with the rise & fall of the sea. They adjust their internal clock depending on the conditions.

Oysters can close their shells for weeks without food

Oysters don’t panic when the amount of food in the water gets low. Nope, they just shut the door. Scientists studying some species found that they stay closed up for more than twenty days straight. Why? Because they burn through less energy that way & it’s kind of like hibernating. Once algae levels increase again, the oysters open and carry on feeding.

Oysters can change their shell color

These creatures aren’t stuck with the same white shell, and Pacific oysters can change colors. These range from pale white to deep purple. It depends on both their genes & where they’re raised. As such, they’re almost like the chameleons of the sea. Pretty cool, right?

The following sources were consulted in the preparation of this article:

7 animals known for being the softest on Earth

Hasthi Wand — Mon, 13 Oct 2025 13:36:29 +0000

“Soft” doesn’t necessarily mean cuddly. In terms of animals, scientists measure softness in tiny hair widths & feather barbs, as well as how densely those hairs grow. Here are seven animals known for being the softest on Earth. Which one do you think is the cutest?

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Sea otter

Scientists counted the hair on sea otters and found that they can have up to 140,000 hairs in a single square centimeter. That’s denser than any other mammal we’ve ever studied. In fact, a sea otter’s underhairs are so fine at 7.6 to 11.9 microns across that water can’t touch their skin. One micron is around 0.00003937 inches, so those hairs are rather small.

Platypus

Yes, a platypus looks odd, but its coat is rather impressive. Each square millimeter carries 600 to 900 hairs & traps a layer of air that keeps it warm while it dives. That’s roughly 60,000 to 90,000 hairs per square centimeter. It’s quite important, as they need to stay underwater for long periods without losing body heat.

Vicuña

You probably haven’t heard of the vicuña. It’s a wild relative of the llama & it has fibers so fine they average only 12 to 13 microns wide. Interestingly, research has shown that these animals have incredible uniformity across herds in Peru & Chile, with each staple of fleece being about 31 mm long. This gives their fiber its smooth, almost silk-like look.

Musk ox

Beneath a musk ox’s shaggy coat, they have something called a qiviut, which is an underwool that insulates the animal against Arctic winters. Qiviut fibers are only 17.5–18.2 microns thick on average & researchers discovered that females usually have slightly finer samples than males. That’s quite different from their coarse guard hairs, which can be ten times as thick.

Angora rabbit

Breeders & textile researchers measured the fibers of the Angora rabbit and found that it’s usually between 12.4 and 14.1 microns. So what’s the secret to their softness? Well, the size is just as important as the structure because the down fibers have little to no medulla, which is the central core in hair. This makes the fur flexible & springy.

Cashmere goat

Cashmere goats produce an undercoat that’s between 15.6 and 19.5 microns in diameter. However, some breeds, especially in Inner Mongolia, can go as low as 13.8 microns. The sex & age can affect the hair’s diameter, and so can the climate. But the cashmere itself is hidden under a rougher outer coat. These animals shed it naturally each spring.

Common eider

In northern communities, eider ducks are famous for their down because it behaves differently from goose or duck down. Each barbule has tiny prongs that hook together & form clusters that cling without stitching. In fact, these clusters spring back into shape and insulate the eider evenly, so it’s no surprise it’s known as one of nature’s strongest soft materials.

The following sources were consulted in the preparation of this article:

8 fascinating facts about insects

Radha Perera — Mon, 06 Oct 2025 08:28:48 +0000

Insects are everywhere. Surprisingly enough, they have some incredible tricks up their sleeves, including chemical sprays hotter than your morning coffee. These creatures are full of surprises. Here are eight remarkable facts about insects, all backed by science (see the end). Which of these bugs surprised you the most?

Featured Image Credit: Shutterstock.

Fire ants link bodies to build waterproof rafts

Fire ants quite literally hold their legs & jaws together with other ants to stay above water. They do this when floods come along. These creatures snap together like LEGO pieces, with enough trapped air to keep the whole colony afloat for days. That’s pretty amazing teamwork. And especially for bugs that usually just bite.

Periodical cicadas run on prime-number schedules

You wouldn’t think that cicadas care about math, but they do. Some cicadas stay underground for thirteen years, or sometimes seventeen. They’ll then crawl up to the surface. Scientists say the odd-number cycles help them avoid predators’ rhythms. And honestly, waiting that long for a few weeks of flying sounds rather wonderful for an insect.

Honeybees map directions with a dance

You might’ve seen bees doing figure-eight moves inside their hives. That’s not just random buzzing around. They’re creating a map to tell other bees where the food is compared to the sun. The wider the angle of the dance, the farther away it is. Essentially, they’re showing off their bee GPS, just without Wi-Fi.

A tiger moth can jam a bat’s echolocation

Tiger moths have the remarkable ability to click away at high speed. This throws off a bat’s echolocation completely. In fact, it’s so strong that the bat’s attack often fails because it simply can’t get a read on where the moth is. Scientists muted the moths during an experiment & the bats started catching them again.

Glasswing butterfly wings cut glare with nano-pillars

Glasswing butterflies look almost invisible in flight, and that’s thanks to their wings that act like natural anti-reflective glass. They have tiny, uneven pillars on the wing surface. These pillars scatter light in all directions, which is quite different from smooth glass. Their wings allow you to see straight through without any glare.

Treehoppers talk by vibrating plants

Instead of chirping like crickets, treehoppers prefer to send messages through plant stems. They create low vibrations that go along the leaves & stalks. Other insects pick it up with their legs, meaning that they’re quite literally talking through plants. How amazing is that?

Cockroaches have an ultra-fast escape circuit

Anyone who’s ever tried to sneak up on a roach will know it’s nearly impossible. This is because they have little hairs on their back end that sense the tiniest puffs of air, sending a lightning-fast signal straight to their legs. They’ve already picked a direction & bolted within a fraction of a second. No wonder they’re so hard to catch.

Dragonflies can see in almost every direction

A dragonfly’s eyes cover nearly its whole head. As such, it can spot movement from the front, back & sides without needing to twist around. But that’s not all. Each compound eye holds around 30,000 tiny lenses, which gives them quite an edge. They notice changes almost instantly from any prey they’re chasing in the air.

The following sources were consulted in the preparation of this article:

7 extraordinary animal abilities

Arvyn Braich — Sun, 05 Oct 2025 08:30:52 +0000

Animals are full of surprises. And some of the things they do may sound unbelievable, but they’re real. These include animals with bubble “guns” & little creatures that can shrug off space itself. Here are seven extraordinary animal abilities and the scientific studies behind them (see the end). Which one do you think is the weirdest?

Featured Image Credit: Shutterstock.

The pistol shrimp cavitation snap

A pistol shrimp is able to slam its claw shut, and it’s loud. Pretty loud. In fact, it blasts out a jet of water so fast that it makes a bubble collapse with a bang. That brief implosion is hotter than the surface of the sun & it also gives off a flash of light. It all comes from a shrimp under two inches long.

The peacock mantis shrimp’s punch

The peacock mantis shrimp uses more than simple muscles to punch. It has a biological “spring-loaded hammer,” which is a kind of joint that stores energy. The mantis then lets the punch fly in a move that’s faster than most bullets in water. In fact, high-speed cameras have clocked the strike at over 50 mph. That’s enough to crack crab shells & even aquarium glass.

The electric eel’s shock

An electric eel is essentially an eel with built-in tasers. It fires off rapid electrical pulses that are able to make the fish’s muscles contract without the fish needing to move. The shock freezes prey in place, leaving it utterly helpless, and the eel can use this ability when it’s threatened. The fish can leap up & deliver the jolt straight to whatever’s touching it.

The bombardier beetle’s boiling spray

This beetle has chemistry labs inside its body, and when threatened, it mixes stored chemicals. These instantly react & heat to boiling. The result? A scalding spray that comes out in bursts, almost like a tiny machine gun, with a temperature that reaches near 212°F. The beetle can swivel its nozzle to aim with surprising accuracy.

The wood frog’s deep freeze survival

Wood frogs do what sounds impossible every winter. They literally freeze. Their hearts stop & ice fills much of their bodies, but they aren’t dead. This is because of the amount of glucose & urea that they pump into their cells. It acts like natural antifreeze. Once the warmth of spring arrives, they thaw out and hop off as if nothing happened.

The hagfish’s rapid fiber-gel

The hagfish is a fish that defends itself with instant slime. Yes, really. It releases threads & mucus that mix with seawater to form a gooey net in seconds. The creature expands so much that it can choke the gills of predators trying to bite it, although that’s not the weirdest part. It’s the fact that it takes very little raw material to make gallons of the stuff.

The immortal jellyfish’s lifespan

Scientists found that Turritopsis dohrnii doesn’t age like other animals. Anytime something bad happens, like injury or stress, these jellyfish can literally de-age themselves. They roll back into their polyp stage. Essentially, they start fresh instead of breaking down with age, and they can do it again & again.

The following sources were consulted in the preparation of this article:

The only state where venomous snakes don’t live

Arvyn Braich — Fri, 05 Sep 2025 21:10:54 +0000

Alaska has many things, like beautiful landscapes and incredible natural views. But no snakes. No, there’s not a single native land snake there, venomous or not, which is quite a big contrast compared to almost every other state. What could be the reason for this? It may not be what you think.

Featured Image Credit: Shutterstock.

Where venomous snakes live in the U.S.

Venomous snakes exist in every state, barring Alaska. Rattlesnakes, copperheads, cottonmouths & coral snakes have all carved out territories in warm areas across the country, with nearly every state having a type of snake. Some of them have several. However, once you head far north, those ranges taper off fast, disappearing completely at Alaska’s border.

Maine and Hawaiʻi

However, there are two other outliers that are easy to overlook. Maine used to have timber rattlesnakes, but they disappeared ages ago, while Hawaiʻi never had native land snakes at all. But sometimes a sea snake drifts in with the current. Yet Alaska takes it further by not having any native venomous land or sea snakes whatsoever.

Cold limits snake biology

Snakes don’t make their own body heat because they’re cold-blooded, so they rely on the sun & warm surroundings to stay active. That’s not great in a place where most of the year is cold. Without reliable warmth, snakes can’t move fast or digest food properly, making it rather difficult for them to survive.

Too short a warm season

Even when Alaska does thaw out, it doesn’t last long, as the warm months are quick, and cool nights creep back in before you know it. That short summer makes it tough for snakes to find enough time to eat or grow. They can’t even mate. Yet in most of the U.S., there’s a big window for all that, which is why they tend to prefer living in other areas.

Permafrost limits winter dens for snakes

Another issue is the permafrost, in which a big part of Alaska’s ground stays frozen year-round. This causes practical problems for reptiles. Snakes need a place underground where they can ride out the cold without freezing solid, but permafrost doesn’t give them much to work with. The thawed soil in the summer is too shallow, so there aren’t many good places for winter shelter.

State law blocks importing venomous reptiles

The state also takes animal control rather seriously & it has rules that ban people from bringing in venomous snakes unless they have a special permit. And almost nobody gets those. Such regulations cut down the chance of anyone accidentally or intentionally letting something dangerous loose.

How snake sightings get reported in Alaska

Every once in a while, a snake turns up somewhere unexpected in Alaska. This is usually because it hitchhiked on a truck or in a shipment. Most of these cases involve non-venomous species that accidentally traveled north. However, officials still track everything closely, as it’s their way of making sure nothing slips under the radar.

The following sources were consulted in the preparation of this article:

10 fascinating facts about crows

Arvyn Braich — Sat, 30 Aug 2025 14:51:21 +0000

Crows sure are mysterious. They hang around parking lots & fly in big groups at sunset, but behind those dark feathers, there’s a lot going on that’s not immediately obvious. Here are ten fascinating facts about crows that’ll surprise you. Which of these do you think is the most interesting?

Featured Image Credit: Shutterstock.

Crows bend wire into a working hook

In 2002, researchers gave a crow some wire & a bucket inside a tube. The crow bent that wire, then hooked the bucket & pulled a piece of bait right out of the bucket, even though nobody showed her how. She even reshaped new pieces when the originals were taken away, proving that crows are capable of tool design, right on the spot.

Some crows solve multi-tool puzzles in sequence

But that’s not all for tools. Crows can use a chain of tools to get something they want, like using a short stick to grab a longer stick, then using that to reach food. They work through it step by step. It’s rather incredible because it means that they’ve mentally pictured the whole plan ahead of time.

Crows remember specific human faces for years

Some crows hold grudges. In field studies, people wearing a “danger” mask trapped crows once, and then disappeared. Years later, when someone showed up in that same mask, the birds sounded the alarm instantly, proving that they could do more than just remember. They actually taught their friends who the enemy was & the memory stuck for close to three years.

They respond strongly to dead crows placed at sites

Crows don’t simply ignore a dead crow when it shows up somewhere. In fact, they’ll gather & caw like crazy, sometimes even calling in backup to help them. They’ll also keep that area in mind afterward. Clearly, crows treat a dead bird like a serious situation worth reacting to, and they can process death.

Crows use cars to crack walnuts

In Sendai, Japan, crows drop walnuts into traffic, and then they wait for cars to run them over. They’ve been seen timing their drops near crosswalks so that they’re able to safely grab the cracked nuts when the light turns red. Essentially, they’re using humans as a tool for their own gains. How incredible is that?

Their brains have “number neurons”

Crows have certain neurons inside their brains that respond to numbers, almost as though they’re tuned to “three” or “five.” And amazingly, they also get the idea of zero. Whenever crows see an empty set, they treat it as a specific quantity instead of just “nothing.” That’s a concept even some animals never understand.

American crows often breed with helpers at the nest

Unlike most birds, American crows don’t always raise chicks as a couple, as extra birds often help them out. These are usually grown offspring. The birds stick around to help feed the babies & guard the nest. Sometimes there’s a whole little family crew pitching in, almost like a backyard bird version of extended relatives.

A crow can sing with two independent tones at once

Hooded crows can actually make two separate notes at the same time. Their vocal organ has two sides that work independently of each other, so one side hits one pitch & the other hits another. The result sounds kind of like two birds singing together. But in reality, it’s just one showing off.

They raise water levels to reach floating food

New Caledonian crows don’t let water stop them from reaching their food. In one experiment, they dropped stones & other heavy bits into tubes full of water until the level rose high enough for them to get their food. They didn’t waste time with sand or lightweight stuff, but instead picked what actually made the water rise fast.

Some crows rub ants on their feathers

Bizarrely, crows don’t avoid ants. They’ve been witnessed rubbing the insects through their feathers or settling down on an anthill so the ants crawl over their bodies. It’s not exactly clear why they do this, but the behavior itself is well recorded. However, it’s possible they’re using the ants to remove bacteria.

The following sources were consulted in the preparation of this article:

Did you know that bulls don’t charge capes because of the color red?

Arvyn Braich — Wed, 27 Aug 2025 15:49:33 +0000

It doesn’t matter what the movies show. Bulls don’t care about the color red, and the truth’s far more interesting than you might realize, especially since bulls’ eyes don’t even work like ours. Let’s find out what’s really going on with them. What’s the most unusual animal fact that you know about?

Featured Image Credit: Shutterstock.

Cattle see two cone colors, not a true red

Bulls’ eyes are wired differently from humans, and instead of three color sensors like us, they only have two. Neither one of these is tuned to red. As such, when they look at that famous cape, it’s essentially just another shade of dull grayish-green, and there’s no red alert going on in their brains.

Red versus green

When light levels are balanced, cattle also have a hard time telling one hue from another because their eyes rely more on brightness differences than subtle color shifts. They’re unable to pick red over green unless the lighting’s uneven. When both of them look equally bright, it’s more of a guessing game when they’re trying to spot the difference.

The importance of movement

So what’s going on? When the cape’s completely still, the bull normally does nothing & just stands completely still. But the second that thing swishes, the animal snaps to attention. This is because bulls rely on motion to decide whether something’s a threat. The color itself is background noise for a bull, compared to a sudden flick or wave.

Fighting cattle show no pull to red

Spanish fighting bulls don’t care more about red than any other color. In fact, most bulls simply react to whatever is in front of them when it moves, and a bright blue tarp would do the trick just as well as a red one. However, most shows use red because it’s easier for humans to see, not the bulls.

Two capes, two colors

Usually, bullfighters use two capes. The first one is often magenta & gold, which the bulls charge at just fine, while the red one is used later mostly for tradition. It also masks the animals’ blood stains. However, in practice, both colors get equal attention from the bull because it’s the waving motion that sets them off instead of the shade.

Red became the usual choice in the 1800s

Matadors didn’t use to have a strict color rule. In the early days, the fighters waved white or yellow cloth, sometimes blue, as red wasn’t the most popular option. It took until the 1800s for it to become the standard. Bullrings across Spain began using the red muleta, and by the late 19th century, it was practically the only option.

The following sources were consulted in the preparation of this article: