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Yayoi Kusama included polka dots in her drawings as a child.
Kusama once wrapped trees in polka-dot fabric for an art show.
Kusama has also created pumpkin figures painted with polka dots.
Yayoi Kusama includes polka dots in much of her artwork.
Yayoi Kusama painted polka dots on people
Yayoi Kusama wrapped polka-dot fabric around trees.
The entire crow family helps raise the youngest birds
Many crows will help build a new nest
Crows hunt together and protect each other.
Crows often work together
Crows build nests as a group
Crows live mostly in open areas with plenty of grasslands.
Ellen Johnson Sirleaf was the first woman to be elected as the leader of an African country. As president of Liberia, she made huge improvements in peoples' lives. Before Johnson Sirleaf became president in 2005, Liberia was in debt, and most people didn't have jobs. The country had also been divided by a long war. After Johnson Sirleaf entered office, she asked other countries for help with the debt. She made it possible for more girls to go to school. She also worked for peace in Liberia. Because of the important work she did in Liberia, she won a Nobel Peace Prize in 2011.
Ellen Johnson Sirleaf's work made the lives of many people in Liberia better
Ellen Johnson Sirleaf worked to give girls the opportunity to go to school
Ellen Johnson Sirleaf worked to give boys the opportunity to go to school
Found in southwestern Asia, the Dead Sea isn't a sea at all. It is a salty lake, and it is much saltier than the ocean. In fact, the Dead Sea is so salty that no animals or plants can live in it. When fish are carried from the Jordan River into the Dead Sea, they die right away. The water is even too salty for plants. In fact, there are only a few plants that can grow in the salty dirt near the lake. The Dead Sea certainly does live up to its name!
Any fish that enter the Dead Sea are killed right away.
The Dead Sea is too salty to support plant or animal life.
The Dead Sea is actually a very salty lake
To be prepared for problems in space, astronauts have to take many classes.
In life-size models of spacecraft, astronauts practice how they'll move in space.
To get used to working while feeling weightless, astronauts train in a large pool.
Astronauts learn how the International Space Station works.
Astronauts complete a lot of training before going into space
Astronauts have certain tasks to do when they are in space.
Some fish puff up their bodies to scare other animals away.
Some frogs change how their skin looks to blend into their surroundings and avoid predators.
Many octopuses can make themselves look like other animals to avoid being hunted.
Animals hide in different places to escape danger.
Some animals can change their appearance to stay safe.
There is an owl that can change its appearance to look very large or very small
As the daughter of a wealthy Illinois businessman, Jane Addams did not have to worry about money. However, she was concerned about the poor. During a trip to Europe, Addams visited Toynbee Hall, a settlement house in London. Settlement houses were places offering free services to the poor. Inspired by what she saw in London, Addams opened a settlement house of her own in Chicago in 1889. Hull House was one of the first centers of its kind in the United States. It helped many families who had just arrived from Italy, Germany, Russia, and Greece. The center offered classes, child care, food, and help with finding jobs.
Hull House was one of the first places in the US to offer free child care, classes, and other services to poor families.
As a result of her visit to London's Toynbee Hall, Jane Addams founded the first settlement house in Chicago
Jane Addams did not have to worry about money.
Finches are among the most popular birds kept as pets. There are several reasons why many pet owners prefer tiny finches to large birds like parrots. First, finches are easy to care for. When provided with a clean home, food, and fresh water, finches usually do quite well. Also, many pet owners are entertained by the finch's busy nature. They enjoy watching finches fly back and forth in their cages. Finally, these small birds make very quiet pets. Though they love to make noise, their chirps sound like soft "meeps"
Finches make good pets because they are quiet
People like finches as pets for a number of reasons
Some people would rather have small pets than large ones
There are several caves to explore under the city of Budapest.
Budapest also has relaxing spring water baths.
Many restaurants and shops can be found along the Danube River in Budapest.
These are great walking trails throughout Budapest
The city of Budapest has a lot to offer visitors
You can visit Budapest's caves and natural baths
The Asian longhorned beetle can harm maple trees' wood.
The forest tent caterpillar can destroy the leaves of maple trees.
Direct sunlight can cause maple trees' leaves to droop in warmer climates.
Maple trees can be damages in a number of ways
The maple tree can catch common tree diseases
There are many different types of maple trees
When people think of Antarctica, they think of snow and ice. When they think of deserts, they think of sun, heat, and sand. Yet in spite of its cold temperatures, Antarctica is actually a desert. In fact, it is the largest desert on the planet. A desert is a very dry environment that receives less than ten inches of precipitation yearly. On average, Antarctica gets less than two inches. Most of that precipitation is in the form of snow, but rain or ice can sometimes fall as well.
Even though Antarctica is cold and has snow, it is a desert.
Most precipitation in Antarctica is in the form of snow, though it can also get rain or ice.
On average, Antarctica gets less than two inches.
The Great Pyramids of Egypt were built thousands of years ago. They were made up mainly of blocks of limestone, a kind of rock used for building. Over the centuries, the pyramids began to fall apart. In the early 1980s, workers began repairing them. They were puzzled when the limestone blocks began breaking. Finally, they found the answer. Using modern cement for the repairs turned out to be a mistake. Water in the cement had damaged the limestone. The workers decided to fix the pyramids in the same way they had been built. They used blocks fitted neatly together. After that, the work was a success
Using modern cement to repair the Great Pyramids was not a successful approach
Workers discovered that ancient ways of repairing the Great Pyramids worked better than modern ways
Workers began repairing the Great Pyramids in the early 1980s
*Deciduous trees shed their leaves for the winter
In the spring, deciduous trees grow new leaves
During the fall, the leaves on deciduous trees change color before they fall off
Deciduous trees start growing new leaves in the spring
The leaves on deciduous trees change during the year
Deciduous trees slow down their growth before fall
Many people in Canada speak French.
French is one of Belgium's three main languages.
Several countries in Africa, such as Mali, use French.
French is a language that developed from Latin
French is a language spoken all over the world.
French is one of the main languages in Canada
Earth is much more welcoming to life than Mars is. Earth's thick atmosphere helps keep the planet warm, with an average temperature of 57°F. In addition, over two-thirds of Earth is covered by water. These conditions make it easy for all kinds of organisms to live here. Mars, on the other hand, has a thin atmosphere and is farther from the sun. Therefore, it is much colder. Mars's average temperature is about -60°F! In addition, the surface of the planet is mostly dry and dusty. Without enough water and warmth, most organisms would struggle to survive on Mars.
Earth has a thick atmosphere and a warm temperature.
Earth is better able to support life than Mars is
Over two-thirds of Earth is covered by water
Dogs and wolves are part of the same animal family. Both animals have strong senses of smell and are loyal to their packs. But dogs and wolves are quite different when it comes to people. Dogs are used to living with people and get along well with them. In fact, dogs have been called "man's best friend." Wolves, on the other hand, cannot live with humans. Wolves prefer to live in the wild, where they can hunt for their food. Clearly, dogs belong with people, while wolves do not.
Wolves and dogs are members of the same animal family, so they have many things in common.
Dogs are better suited to living with people than wolves are.
Wolves prefer to live in the wild.
When baking, people measure the amount of food.
People measure how much medicine they need to take.
To stay on time, people measure how long it will take them to complete a task.
Most kitchens have tools that are used for measurement
Measurement is an important part of everyday life
Temperature measurements are important when baking
Bright and beautiful, marigolds add color to a garden.
The heads of marigolds can be used as medicine.
Marigolds can bring helpful bugs to a garden.
Marigolds make gardens more colorful
Roses, tulips, and marigolds have different uses
Marigolds are useful flowers.
Edouard de Laboulaye, a French writer and law professor, admired the freedoms enjoyed in the United States. He supported Abraham Lincoln's freeing of slaves during the Civil War. After the war, in 1865, he suggested that France present a statue to the U.S. The statue was meant to honor Lincoln and American democracy. At that time, the French people had little say in their government. Laboulaye hoped the statue would encourage the French to demand more freedom at home. Work began on the project in 1875. Ten years later, the statue, known as the Statue of Liberty, finally arrived in New York.
Edouard de Laboulaye wanted the Statue of Liberty to inspire freedom and democracy in France.
Edouard de Laboulaye came up with the idea for the Statue of Liberty after the American Civil War ended
Ten years later, the statue, known as the Statue of Liberty, finally arrived in New York
A female kangaroo has a special fold of skin that forms a pouch. The pouch is like a large pocket on its stomach. When a baby kangaroo, or joey, is born, it climbs into its mother's pouch. At birth, a joey is only about one inch long. It needs to stay in the pouch so it can grow more. After several months, the joey has grown enough to leave the pouch for short periods of time. By the time the joey is ten months old, it is ready to leave the pouch for good.
Female kangaroos have pouches on their bellies for carrying their young.
A baby kangaroo stays in its mother's pouch until it's strong enough to live on its own.
The pouch is like a large pocket on its stomach.