Starfish Are Heads That Can Crawl + Other Animal Facts

It turns out that starfish are their own heads.

A starfish looks like it has five arms at first glance. Researchers have always been interested in why starfish look this way and where their heads are. Most animals, including humans, have bodies that are bilaterally symmetrical, which means that you can cut them in half and get two sides that are the same. But starfish, sand dollars, and other sea creatures are radially symmetrical, which means that their iodes have identical shapes. Parts spread out from the middle: Starfish and sea stars are unique because they are symmetrical in five ways, which means they can be split into five equal pieces.

Scientists used a method called RNA tomography to study genes. They focused on the genes that control the outer layer, which includes the nervous system. Surprisingly, genes related to the head were active in the starfish's head and arms, but genes related to the body trunk were not very active. This shows that the starfish's head and body are separate in a unique way. This study made people wonder how these animals developed and what their ancestors with trunks might have looked like.

Based on ancient records, genes that are active in an acorn worm's head were also active in a starfish's skin that covered its whole body. These genes are most active in the middle of each arm and change to look like genes found in other animals' rear ends as they move toward the ends of the arms. Since starfish don't have the genes for a body, this goes against what most people think about their anatomy.

There's a story that at the end of The Beetles song, Paul McCartney recorded an ultrasonic whistle for his Shetland sheep dog. In "A Day in the Life," it's shown that dogs can hear ultrasonic sounds because they can move just one ear. dogs need to involve 18 muscles it allows them to quickly find the origin of sounds and it's another skill where they outshine us their awesome ears sometimes Shadow their noses. Dogs sense of smell is up to 100,000 times more sensitive than that of humans, while humans have around 5 million scent receptors, a blood hound boasts up to 300 million.

Another study shows that dogs and bottle-nosed dolphins may share a fascinating similarity with humans they call out the names of loved ones when they become separated. This makes them the first non-human animals to do so. The study has uncovered that Dolphins copy one another's signature whistles when they're separated from close Pals.

In the Sarasota dolphin study program recordings, pairs of dolphins were held in separate Nets but they could still interact with each other, turns out some of their chitchat were mimicking the unique whistles of their dolphin Buddies.

Next up we have flamingos with their odd dining habits you often see them feeding with their heads positioned upside down this distinctive behavior is linked to the anatomy of their mouths and the mechanics of maneuvering their long elegant necks into the water. These birds are skilled filter feeders employing their tongues as effective sives to catch food. When a flamingo lowers its neck beneath the water it positions its mouth essentially upside down then the bird closes its mouth and skillfully propels water through comb like extensions on its beak it also utilizes its tongue to expel the water while keeping all the gathered food.

If you've watched the movie "my octopus teacher" on Netflix, you might already know that octopuses can bond with people but this time we'll only focus on the anatomy of this creature. Octopuses have three hearts, one heart sends blood throughout the body and the other two tag teams send that blood to to the animals gills. Octopuses also have nine brains, each of their eight limbs has its very own mini brain. These mini brains allow each tentacle to move separately at lightning speed. There's a ninth brain in the mix and this one controls the entire octo nervous system. Aosom are clever in a way two they're known for trying to pass away when their life is threatened when they face Predators. Aosom try to intimidate their foes by showing their teeth hissing and growling yet when these tactics fall short aossums turn to shutting their eyes collapsing onto their side and pretending to have passed away to look more convincing an aasum might drool Let its tongue hang out and even excrete waste to improve the image of a sudden demise. Remarkably, AP possums can support this state for several hours waiting until they're sure that the threat is gone.

Monkeys can be loud when calling one another but a howler monkey shell can move roughly 3 miles in specific situations. Males are usually louder than females, the thing is the sound is made by pulling air through a space in a swollen bone in the animal's throat this bone is larger in males compared to females and that's why males sound louder.

Polar bears have black skin beneath all that fur their fluffy white coat is actually transparent it only seems white because it bounces back visible light the skin itself is jet black. These creatures are also amazing when it comes to swimming, they can hit speeds of up to 6 mph in the water which is pretty fast for such big creatures. They can swim for miles and keep going for hours, their big paws are made for swimming they use them to paddle through the water while their back legs stay straight and acts like a Rudder helping them steer.

Since we visited polar bears, we might as well add a sweet fact about penguins here. Male genu and Adalie Penguins put themselves out there with offers. They offer their possible mates precious Pebbles important for making nests in the harsh Antarctic landscape. If the lady penguin takes the pebble they're in it for life bonded and ready to mate.

Another study has found that our cute house cats share more than 95% of their genetic makeup with tigers. These little furballs also copy many behaviors of their wild cousins like marking territory with scense and the classic stalking and pouncing during playtime. Biologically, though a cat's brain is kind of similar to a human's, we share equal emotional areas in our brains. Cats can also make up to a 100 different sounds.

Owls have eye tubes or cylinders their rod-shaped eyes don't do the eyeball moving. Our eyes can move in almost all directions, owls have to make a full body or full head turn to look around all because of night vision to learn the art of seeing in the dark. They need big corneas that can scoop up every bit of light. Most nighttime Critters like slow lorises or Tarsiers have huge eyes to get the job done but owls have small heads on their agenda so those big eyes couldn't swell out.

Our cockroaches are renowned for their survival skills and a key reason is their unique brain structure. They have two brains, one in their head and a more basic one near their belly. They're so hard to get because these Critters are incredibly quick to respond.

They have tiny hairs on their rear end that can feel the slightest Breeze when these hairs twitch, the Cockroach doesn't waste time it quickly switches to escape mode.

Research shows that a cockroach can react in just 12th of a second so by the time we turn on the light or grab something to target it, the cockroach is already speeding off.

Cats can have dreams, sometimes you can see your cat's whiskers twitching or its legs kicking while it's sleeping this doesn't necessarily mean your pet is having a nightmare. We can look at human sleep to get an idea about what's going with our feline friends during REM sleep. Our brains get Super Active almost like when we're awake that's also the prime time for dreaming REM sleep is named this way because of the quick movements the eyes make under the eyelids but while our eyes might be moving the rest of our body stays still the focus is on what's going on in our minds this is true for cats too besides an occasional twitch cats usually don't move much when they're asleep that's it for today.

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