Name: 你的貓咪問題得到解答!| 彙編 (Your Cat Questions Answered! | Compilation)
Uploaded: 2021-01-14T10:31:38.000Z
Duration: 25 min 12 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

a little while ago, we made a compilation video where we answered your most pressing dog questions.

情態副詞

But we hear it's I show our pet non Ferguson's so naturally we needed to make a compilation dedicated to our feline friends as well.

It's often said that we humans didn't domesticate cats.

Instead, they domesticated themselves, and there's some truth to that.

What's less often repeated, however, is the hypothesis that it happened more than once years Hank, to explain how that's even possible.

Cats, We know what they like to chase lasers and lick their own butts.

There's a lot that we don't know about cute little whiskers like where her cuddly domestic ancestors came from and when she evolved from wild animals.

We used to think that the earliest historical evidence for domestic cats was from ancient Egypt, like art and mummified remains from around 4000 years ago.

But now some clues air pointing to domestic kiddies older than that from separate places across the globe.

The oldest, probably domestic cat skeleton we've found was in 2001 on the island of Cyprus in the Mediterranean Sea.

Scientists guessed that this cat lived around 9500 years ago, which makes sense historically, that's after people started farming in the fertile crescent that not totally desert region in parts of Western Asia in northern Africa, farming means you have to store extra crops somewhere, and piles of tasty grain attract rodents.

And for hungry cats, that's an all you can eat buffet.

So one hypothesis is that feral cats might have started snagging some meals in getting cozy with humans.

Humans were happy to have them, too, because they took care of the pests and were fluffy and cute.

By this time, we think humans have domesticated other animals like dogs, cattle and sheep.

So adding another furry friend wouldn't seem all that unusual.

And we think this cat from Cyprus was a pet for a couple of reasons.

First of all, Cyprus is an island with no native cats, so someone must have brought them over on a boat.

And if they weren't a little tame, that would have been a scratchy, panicky animal mess like you might know how hard it can be to get an uncontrollable kitty just to the vet back.

Plus, the cat was buried with a person, presumably its owner, and surrounded with carved seashells.

Wild animals wouldn't get this special treatment, and if the cat was a meal, it's bones would have been separate and probably scattered.

All of this evidence lines up with a study published in the journal Science in 2007 which looked at the genetic origins of domestic cats.

Those researchers found that our feline friends are most closely related to the Wildcat.

Phyllis Sylvester's specifically the near eastern subspecies your eyes.

Also, if you look at this, cat will back this evidence up because they look a lot like domestic cats.

So lots of signs point to domestic cats splitting off from their wildcat cousins in the fertile crescent hold on.

Some other scientists discovered probably domestic cat bones in 2001 in an ancient millet farming village in central China.

A close computer analysis of job own shapes showed that these cats weren't related to the wildcat at all.

Instead, they were a kind of leopard cash, which is in an entirely different genus from small animal tunnels Throughout the excavation site and ceramic containers that looked like they stored grain.

The researchers were pretty sure that this village had a rodent problem, and by looking at the carbon isotopes in cat's bones, it was clear that they ate lots of small animals that ate lots of human grown millet.

This was the first convincing evidence to support the domestic cats eat pests that eat grain hypothesis that this domestication happened in different kinds of cats around 5300 years ago.

On the other side of this huge landmass up, what's the real story, the Middle Eastern or the Chinese domestication of cats?

Well, there's no reason to think that domestication couldn't have happened twice in two separate places with two separate cat species when people started farming.

Great, but remember, genetically, all of our modern cats seemed to be descended from the Wildcat, not the leopard cat.

Maybe the domestic Wildcats were just snuggle earlier and had a leg up to win our favor.

See, Domestication leaves its fingerprints in an animal's Gino, so even though any cat person will joke that they're cats are too independent to really be considered domesticated, we can look at these genetic fingerprints.

2014 collaboration between a bunch of American universities took a close look at the domestic cat genome, using 22 different breeds from different places.

The study found recent changes in genes that control the development of the cats nervous system.

These genes could play a role in how domestic cats, for example, behave less defensively in new situations and can change their behavior in response to reward.

In other words, compared to a wild cat, fluffy is genetically more likely to walk up to you with a friendly headbutt and beg for treats.

This could explain why our cats are extra snugly.

The ones that got along best with humans could take advantage of our rodent pests and table scraps and survived to pass on their genes.

So in a way, cats did domesticate themselves, and it seems like they did it more than one time, which kind of means that the rise of cat videos was practically inevitable.

We like to think that we have contributed to the vast library of cat videos and maybe even added some science to the mix to next up.

Cats have lived with us for thousands of years, but they still share Bunty of features with their wild counterparts.

Like the keen senses of a nighttime hunter.

That's where they do that faintly alarming laser.

I think when you get up to go to the bathroom at 3 a.m. as Michael vividly explains, it could be terrifying to wake up in the middle of the night to a pair of glowing eyes staring at you from the darkness, only to realize that it's just your cat.

Or is it lots of animals, including alligators, fruit bats and dogs?

I'll have a shiny structure in their eyes that gives them better night vision, which also causes this creepy glow.

The layer of tissue at the back of your eyes is called the retina, and it's made up of special, light sensitive cells.

Light that hits those cells gets turned into an electrical signal that sent along the optic nerve, which sits behind the retina.

That signal travels all the way to the brain and light that Mrs those cells isn't turned into.

Many species across the animal kingdom have the same basic ice structure from reptiles, two birds, two other mammals like cats.

One way animals have evolved to see better is to have more of these light sensitive cells in each eye.

Humans, for example, have over 95 million of them Perretta.

But a lot of animals, especially nocturnal animals whose eyes have toe work well at night, have another way of detecting more light.

They have a structure called the tip Eatem lucid um, which is Latin for bright tapestry.

It's a layer of tissue that sits behind the retina and acts like a mirror to beatem.

Lucid, um, reflects light that goes through the retina back at those light sensitive cells, giving them another chance to detect.

But some of that reflected light flies back out of the animals pupils, which is what makes it seem like their eyes were glowing.

The color of that glow, also called I shine, depends on what the two PM lucid, um, is made of.

And different critters have different highly ordered molecules or fibers that create a reflective surface.

Some fish use Guan in one of the chemical building blocks of DNA and have white I shine.

She'd have collagen, which also provide structured of muscles and skin, and lots of animals, which leads to a blue or green glow, and cats use rival Flavin and zinc, among other molecules.

And the matter of zinc does a lot to determine how yellow or green or even blew their eye shine is so your kiddies eyes aren't actually like little flashlights.

They're just reflecting some of the ambient light in your room.

But if they start glowing red and shooting laser beams, you should probably one.

We ought to know that none of our cats have displayed this behavior to date.

But while your cat may think they're a fierce, majestic predator patrolling the savannahs of your living room, they have more in common with smaller Wildcats than lions and tigers.

Can't roar like Big Cat scan, for example.

They can purr, though, and that seems like more than a fair trade.

Here's Hank to explain why it's usually one or the upper.

She is adorable, and recently she peed inside of a potted plant.

But can you imagine how amazing it would be if she could roar while peeing inside of a potted plant?

That should be like give me some treats and then, like a ferocious roar, it would be so cool.

Only four species in the cat family can lions, tigers, leopards and jaguars.

Zoologists are pretty sure that those four species of cats can't purr.

So even though my cat can't roar, the reason probably has a lot to do with the things in her throat that let her purse.

There is no like per box that we can locate in a cat, and no one's ever stuck a purring cat into a memory to find out exactly what's happened.

But we've known for a while that it probably involves the larynx, a k a.

Back in 18 34 a British zoologist named Richard Owen noticed that there was an anatomical difference between the cat species that purred and the ones that roared roaring cats at a more flexible highway.

The hyoid is a structure that supports the tongue and larynx humans, its horseshoe shaped.

It's basically the first bone under your chin in the front of your neck, although you shouldn't be able to feel it from the outside.

So maybe don't go squeezing up around in there on the murder shows.

It's how they know people got strangled and when they got killed, they're always like the highway is broken.

That's how we know that the murder was the squeezing that kind and cats.

The hyoid is more of a hook that hangs down and connects the back of the skull to the front of the larynx and the base of the tongue.