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  • Within every major city, there’s a hidden population.

  • Each day is a struggle for survival, but these inhabitants have perfected the art.

  • Theyre unstoppable, indestructible, and cities can’t seem to solve the problem no

  • matter what they do.

  • Oh Rats!

  • No really, I mean rats -- how on Earth do they manage to thrive so well?

  • The first question is, why are these rodents the undesirables of the world?

  • Well, every year, they devour a significant portion of crops worldwide and are a threat

  • to native wildlife and public health!

  • Meeting one of them in the subway, or, even scarier, in your own toilet, will unlikely

  • bring you much joy.

  • It’s no surprise huge cities have tried different methods to get rid of them, and

  • I’ll tell you about the most creative ones a bit later.

  • But for now, here’s a tip of the hat to their incredible survival skills!

  • Their biggest asset is their numbers.

  • In New York City alone, there’s possibly 10 million rats, but some estimates put it

  • up to 30 million!

  • And those numbers grow exponentially.

  • One mother rat can have 8 to 12 babies every 30 days if there’s enough food, water, and

  • shelter.

  • If you do some simple rat math, youll see that one couple can have 144 babies each year.

  • Those rat babies can have their own offspring when they turn 2 or 3 months old.

  • Add the amount their babies and grandbabies can produce, and youll get an empire of

  • 15,000 descendants from one rat couple in a year!

  • Multiply that by all the rat families in the city, and the numbers skyrocket to the unimaginable.

  • Besides that, they can eat just about anything.

  • All the trash in the city makes it the perfect real estate for rodents.

  • They can climb brick walls, trees, and telephone poles.

  • They can walk over electric lines, get through holes the size of a quarter, dive into plumbing

  • systems, and walk away unscathed from a 5-story tumble.

  • Their teeth grow about 4 inches a year, so they need something to gnaw on.

  • Again, urban living has plenty of materials for that!

  • Finally, and most importantly, theyre very intelligent.

  • Plenty of studies show that rats can even use tools.

  • When they find some new food, they only take a tiny bite first to wait and see if it’s

  • safe or not.

  • Hey there’s always winner in the Rat Race!

  • Plus, they can even develop resistance to different substances used against them.

  • So, the struggle is real when it comes to ridding the city of them.

  • Now, remember, rats aren’t total villains.

  • Theyre just doing what any species is meant to do: survive and multiply.

  • Unfortunately for us, living near humans makes that goal easier to carry out.

  • Hoping to prove they can’t really be invincible, New York City started a $32 million anti-rat

  • campaign in 2017.

  • They replaced traditional trash cans with the ones that have mailbox-style openings.

  • This would deprive rats of their favorite food source.

  • The attempt hasn’t been that successful so far

  • 10 years before that, Brooklyn officials tried a more extravagant solution.

  • They let some opossums run wild and free in local parks, hoping they’d lower the rat

  • population.

  • To their surprise, the opossums preferred to keep peace with the rats and feasted on

  • gardens and trash instead!

  • So, soon enough, possums became the new problem!

  • In Chicago, they went even further and let coyotes roam the city streets!

  • This was part of a research project to see how the animals survive and behave in the

  • city.

  • Coyotes are natural hunters, so they won’t take food that comes easily from a dumpster

  • they’d rather track down rats instead!

  • And, to answer your questionno, the canines haven’t been in any coyote vs. human incidents.

  • And, no, they haven’t solved the rat issue yet

  • In Paris, where there are about 4 rats for every human, theLe Smashcampaign takes

  • place every spring.

  • Special teams disinfect public spaces like parks, and people take care of their own homes

  • and businesses.

  • The officials even encourage citizens toratatouilleon their neighbors who don’t take good care

  • of their trash and, thus, feed the rodents.

  • They also have an interactive rat map and hotline to inform of mass sightings.

  • Since none of these solutions have worked so far, I guess it’s fair enough to say

  • youre never more than 6 feet from a rat in some places.

  • Does that sound accurate for where you live?

  • Let me know down in the comments!

  • And while were here, let’s bust some common pest urban legends!

  • Rats are dirty and smelly.”

  • Rats might not smell like your favorite perfume because they live in a pretty filthy environment.

  • But they aren’t any dirtier than other animals.

  • Anyone who’s had pet rats will know that they spend more than half their day cleaning

  • themselves and their pals!

  • Yeah, just like cats!

  • Theyre wild animals bent on survival.”

  • Sure, theyre good at avoiding being wiped out, but there’s a lot more to rats than

  • you’d think.

  • Like, that they feel empathy!

  • Japanese researchers offered them an uneasy choice: one door led to a chocolate treat,

  • and the other allowed them to save their trapped friend.

  • Most of the rats, especially those who’d previously been trapped themselves, chose

  • their friends over food!

  • Wow.

  • Cheese is the best bait for mice traps.”

  • Because mice love cheese, right?

  • Well, sure, mice will eat pretty much anything you give them.

  • But cheese isn’t the best choice as a bait.

  • If youre looking for a better alternative, something sweet, like dried foods or peanut

  • butter, will do much better than dairy.

  • Pests don’t live in clean homes.”

  • You might see pests as something that automatically comes with a filthy home, but they aren’t

  • solely attracted to dust and grime.

  • Theyre looking for shelter, food, and water to start nestingthey can find all that

  • in a spotless home too!

  • So make sure you don’t leave open food anywhere in your house.

  • Instead, cut off their access to it, and theyll be less tempted to live with you.

  • Adult moths can mess up your wardrobe.”

  • If you open your closet and see adult moths fly out, don't panic.

  • Your wool, cashmere, and silk are fine as long as they haven't laid larvae in there

  • yet.

  • The larvae are the real problem because they need the keratin in those natural materials

  • to grow big and strong.

  • Sachets filled with dried lavender, mint leaves, or peppermint oil will prevent them from doing

  • so.

  • Also, moths aren’t great fans of cedar dressers and wardrobes.

  • Bees can only sting once.”

  • When a bee stings someone in the room, and you think you and others are safe now since

  • it only does it once, don’t let your guard down so easily.

  • Only honey bees sting just once.

  • Other bees, wasps, and hornets can sting repeatedly, so watch out!

  • Boiling water will help you get rid of ants.”

  • Nope, that’s just cruel and ineffective.

  • It won’t do anything to solve your ant infestation because the queen and the rest of the colony

  • will remain somewhere else untouched.

  • If you mix vinegar and water in a 50/50 ratio in a spray bottle and clean the floors, windows,

  • and countertops with it, the whole colony will probably pack up and move somewhere else.

  • Fleas need a host to survive.”

  • Fleas can live up to 155 days without any food source whatsoever.

  • Theyll do fine even in a totally deserted home!

  • If you can’t see them, they aren’t anywhere near.”

  • Even if your house looks pest-free, it doesn’t mean they aren’t there.

  • Termites and carpenter ants hide and feast inside the walls.

  • Bed bugs are active at night, so you won’t see them during the day.

  • To be sure you don’t have unwanted little roommates, you might have to spend some extra

  • money on pest inspectionsit’s worth it, though!

  • “A bug zapper will get them all, including mosquitos!”

  • Well, here’s the buzz on that.

  • No, it won’t.

  • Mosquitos aren’t attracted to light.

  • They, like a lot of biting insects, use their sense of smell to detect a food source.

  • (More specifically, the carbon dioxide you release with each exhale!)

  • You mightve zapped a mosquito or two in one of those things, but, overall, theyre

  • useless against these and many other insects.

  • Finally, there’s this about rats.

  • If you spellratsbackwards, you getstar”.

  • So does that mean that rats come from outer space, because Mickey Mouse was a Star?

  • Only if youre a conspiracy theorist.

  • Sometimes, rats are just rats.

  • And before you write something, yes, Mickey was a mouse.

  • Hey, if you learned something new today, then give the video a like and share it with a

  • friend!

  • And here are some other cool videos I think you'll enjoy.

  • Just look to the left or right, and choose one.

  • And remember: stay on the Bright Side of life!

Within every major city, there’s a hidden population.

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B1 中級

なぜ大都市はネズミでいっぱいなのか (Why Big CitiesAre Full of Rats)

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    林宜悉 に公開 2021 年 01 月 14 日
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