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Rats

Adorable creatures or gross pests? This is the story of the most loved, most hated rodent on the planet.

By Allison Friedman
From the March 2022 Issue

Learning Objective: to analyze and compare tone in two articles about rats

Lexile: 820L

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AS YOU READ

As you read the articles and study the images, think about each author’s attitude toward rats.

Ewwww!

Rats are stealing our food, trashing our stuff, and making us sick. Can they be stopped?

Humans are at war. Our enemies have powers that we can only dream of. They claw their way up the sides of buildings. They collapse their ribs to squeeze through tiny spaces. They have teeth as strong as steel. 

No, these aren’t villains from a superhero movie. And they’re not aliens from a faraway planet. In fact, they’re living right underneath our feet.

They are rats.

Rats and humans have been locked in battle for thousands of years. It’s a war that has cost billions of dollars and endangered millions of people around the world. We have tried almost everything to defeat our enemies: poisoned them, trapped them, hunted them with dogs.

But so far, the war rages on. And scientists aren’t so sure that we’re going to win.

imageBROKER/Alamy Stock Photo

Furry Shadows

Nigel Cattlin/FLPA/Minden Pictures

Picture a rat in your mind: The grimy fur. The long, skinny, yellow teeth. The bald, wormlike tail. Do you feel a creepy tickle in the pit of your belly?

It's not just you. Many people share a disgust for rats. Of course we do. Rats have been pestering us for more than 4,000 years. They escaped from traps in ancient Egypt. They gobbled up crops in ancient Greece. They snuck into grain storage buildings in ancient India, stuffing their faces and leaving behind their droppings.

As the centuries passed and humans began traveling farther and farther around the globe—to explore, to trade with each other, to fight wars—rats came along for the ride. They hid in the bottoms of ships, helping themselves to the crew’s food and water. When the ships arrived at their destinations, the rats scampered ashore and made themselves at home.

In this way, rats established themselves in one place after another. And wherever they lived, they followed humans around like furry little shadows. They stole our food, feasted on our garbage, and nested in our homes.

But rats did more than just get on our nerves. They also brought misery and death.

Disease Spreaders

In the 1300s, people across Africa, Asia, and Europe began getting sick. They burned with fever as oozing purple sores bubbled up on their skin. Death came within days.

This horrific disease was called the plague, and it spread with terrifying speed. Within just a few years, as many as 200 million people died.

At the time, people struggled to determine the cause of the scourge. Were people being poisoned? Was it a punishment from God? What no one suspected was that rats were one of the culprits.

Today, scientists know that rats carry dangerous germs inside their bodies. (This is not so surprising considering these creatures crawl through sewers filled with human waste.) Many of these germs can spread to humans and make us sick.

People can get infected by touching rats, getting bitten by them, or eating food contaminated with their urine or excrement. In the case of the plague, the disease is often spread from rats to humans by fleas. When the fleas bite the rats, they slurp up plague germs along with the rats’ blood. When the fleas then bite humans, they pass those germs along.

The plague is just one of more than a dozen diseases that rats can spread to us. In the past 1,000 years, diseases carried by rats are thought to have caused more deaths than all wars on Earth combined.

Rat Explosion 

So how exactly did rats end up in the United States? They made their way to North and South America from Europe. Brown rats, the most common type in the U.S., first arrived in the late 1700s. By 1926, they had scurried into every state. You could find them everywhere, from the filthiest sewers to the fanciest restaurants. Even the White House has had to deal with rat problems. In the early 1900s, President Theodore Roosevelt would lead his sons on rat hunts in the White House dining room.

Since then, the number of rats in America—and worldwide—has exploded. They especially love cities, where there’s an abundance of garbage to eat. They nest underneath sidewalks and in shadowy alleyways.

No one even knows exactly how many rats there are. What we do know is that they’re causing huge problems.

Although we now have medicines to treat the plague, rats continue to spread diseases to hundreds of thousands of people each year. They also gnaw through our walls, pipes, and electrical wires, causing fires. Each year they eat or destroy enough food to feed 200 million people. And humans aren’t the only ones tormented by rats. Rats scarf down the eggs of birds and reptiles, which has caused the extinction of dozens of species and put dozens of others at risk.

Traps, Poison, and Dogs

Clearly, something has to be done. Around the world, cities have hired pest control experts to set traps and leave out poison. They’ve even used specially trained rat-hunting dogs. So far, these efforts have had little effect on rat populations. In fact, the number of rats in cities has risen by about 20 percent over the past 10 years, according to Robert Corrigan, a scientist and an expert in controlling rats.

As Corrigan explains, rats are survivors. “They are amazing at adapting to a long list of challenges,” he says. They can live almost anywhere and eat almost anything. (Soap? Delicious! Shoe leather? Yes, please! Glue? Yum!) They’re also smart and quickly learn to avoid traps and poison. And they reproduce quickly: A female rat can have more than 200 pups a year.

Cleaning Up Our Nests

But the biggest obstacle to bringing rats under control isn’t rats, Corrigan says. It’s us.

“We humans do not handle our garbage correctly,” he explains. In the U.S. alone, people create almost 300 million tons of garbage each year. (That’s more than 100,000 times the weight of the Statue of Liberty.) Much of that trash ends up spilling out of garbage cans and littering the streets—where it becomes a tasty meal for rats.

Climate change also plays a role in our rat problem. Air pollution is causing temperatures on Earth to rise. Winters are getting warmer and shorter. That’s great news for rats, which are less active in cold weather. They now have a longer warm season to gather food and breed.

So if rats are monsters, we helped make them that way. And if we want to control them, we’re going to have to learn to control ourselves first.

The good news is we can all take small steps to help—such as picking up litter in our neighborhoods, tightly sealing trash can lids, and discarding as little food as possible. This, Corrigan says, is our best chance of winning the war against rats.

“The solution to the rat problem is to pay more attention to our own ‘nests,’” he says. “Humans need to take better care of Mother Earth.”

Awwww!

8 reasons to ♥︎ rats

If you’re like a lot of people, the word rat makes you cringe. It evokes images of furry fiends lurking in our homes or wriggling little monsters rooting around in garbage cans, slick with muck and stink. Indeed, few creatures are more hated than the rat. But while it’s true that rats can be found scurrying through some truly gross places (ahem, sewers), they hardly deserve to be so reviled. In fact, rats are extraordinary creatures worthy of our respect and admiration. Here’s why.

Chris Scuffins/Getty Images

1. They’d take gold at the Olympics.

Rats are swimming superstars. Many can tread water for three days straight and hold their breath for up to three minutes.

2. They are the Spider-Mans of the rodent world.

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Thanks to their long claws, rats are great climbers. They can carry objects that weigh far more than they do. And they can drop to the ground from 50 feet without so much as a stubbed toe.

3. They’re incredibly smart.

Rats are basically geniuses. They learn quickly and remember what they’ve learned. They’re great at finding their way out of mazes. In one experiment, rats even learned how to drive tiny rat-sized cars!

4. They make fantastic pets.

iStockPhoto/Getty Images

Rats have been bred as pets in the U.S. since the 1800s. Pet rats are calm, loyal, and affectionate. They can be trained to use a litter box and play fetch. Rats can also learn to respond to their names when called. They’re clean too, grooming themselves even more than cats do. Rats are also less expensive to care for than many other pets.

5. They are heroes.

The Belgian nonprofit APOPO trains African giant pouched rats to sniff out dangers to humans. Some rats learn to detect the disease tuberculosis. Other rats learn to sniff out unexploded land mines— that is, bombs hidden on or under the ground. Many land mines get left behind after a war, posing a deadly threat to people who live nearby. Thanks to APOPO’s rats, more than 108,000 land mines and other explosives in Asia and Africa have been safely removed.

Xavier ROSSI/Gamma-Rapho via Getty Images (land mine); PDSA/Cover Images via AP Images (Magawa)

Inset: That’s Magawa. He found 71 land mines in Cambodia. He was awarded a gold medal by PDSA, a charity in the UK, for lifesaving bravery. Magawa is the first rat to receive this honor.

6. They have feelings.

Empathy—the ability to put yourself in someone else’s shoes—is often considered a uniquely human trait, though it has been observed in some animals, such as chimps and elephants. New research suggests that rats might have empathy too. They form close bonds, and they help one another out.

7. They laugh.

PetStockBoys/Alamy Stock Photo

When tickled, rats seem to laugh. They emit a high-pitched chirping that the human ear can’t detect. But when converted to a level humans can detect, the sound is one of the cutest things you could ever hear. Researchers have linked these vocalizations to feelings of happiness.

8. They symbolize admirable traits.

In the Chinese zodiac, every year is represented by an animal. There are 12 animals altogether—so each one comes around every 12 years. The animal under which you are born is said to help determine your personality. According to legend, a Chinese emperor held a race to determine which animal would have the honor of being first in the cycle. The rat won! Those born during the year of the rat are associated with ambition, charm, and the ability to solve problems. That’s not surprising considering how clever and adaptable rats truly are.

Writing Prompt

The two articles you just read present different perspectives on rats. Analyze each author’s tone. How does reading two passages with different perspectives affect your understanding of rats? Support your analysis with text evidence. 


This article was originally published in the March 2022 issue.

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1. PREPARING TO READ (20 MINUTES)

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