Intermediate

Do you like to eat fruits and vegetables? Why is it important for us to eat them? You can buy vegetables, but many kinds are easy to grow yourself at home. All it takes is a little bit of… Read More →

Why does the wind blow? What does air pressure have to do with a thunderstorm? Why is a mountaintop snowy while the valley below is warm? The answers to these questions all involve the… Read More →

"Come out for freedom! Come out now! Power to the people! Gay power to gay people! Come out of the closet before the door is nailed shut!" —Come Out! magazine, November 14, 1969 On the… Read More →

Josh and Danny are stuck in Princess Land—a store full of pink toys and worse: actual girls! To avoid security guards and screeching girls, the twins try a quick spritz of the infamous… Read More →

If a black dog and a white dog have puppies, what color will the puppies be? Genetic scientists have been trying to answer this question for hundreds of years. Genetics is the science of… Read More →

Have you ever solved a tricky puzzle? As kids, Joanna Kelley and her siblings had fun solving the math and science challenges their parents invented at the dinner table. Later, Kelly's love… Read More →

Printing words in books originated in China with the invention of movable type. But books aren't the only way we've communicated throughout history. Find out who invented the first radio,… Read More →

Tin cans were first produced in London in 1813. But they had to be opened with a hammer and chisel, because the can opener wasn't invented until 1855! Check out other amazing engineering… Read More →

Before magnifying glasses, how did people make objects look larger? The ancient Romans filled glass bowls with water. Then microscopes and telescopes came along. But optical innovation didn't Read More →

Have you ever used your imagination to solve a problem? When Albert Einstein was young, he was fascinated by the way magnetism made a compass work. As an adult, he used thought experiments to Read More →

Bicycles were only invented about two hundred years ago—and the first ones didn't have tires or brakes! But bikes aren't the only way we've tried to conquer the roads, seas, and skies. You'll Read More →

Genocide has become the human rights issue of our time. This book focuses on the genocides of the twentieth century, explaining what genocide is and discussing it in light of international… Read More →

Over the past 50 years, scientists have made incredible progress in the application of genetic research to human health care and disease treatment. Innovative tools and techniques, including Read More →

An adult manatee is twice as long as your bathtub and weighs as much as a grand piano. These roly-poly mammals live in warm, shallow water all over the world. These curious, gentle creatures… Read More →

Most scientists agree that Earth is warming rapidly. Glaciers are melting and rising seawaters are submerging islands and coastal cities. In the coming decades, millions will likely have to… Read More →

Math Lab for Kids proves that math is more than just numbers—the hands-on activities in this book make learning math fun! In Geometry and Topology, kids learn to think about shapes in new… Read More →

There is a new craze at the wildlife park: People Cards! George the Giraffe and his friends want to collect them all, but they may have to work together to get the full collection! Full-color Read More →

George Frideric Handel (1685–1759), a German-born Baroque composer, achieved international acclaim for his operas, oratorios, and instrumental compositions. Notable works include Messiah and Read More →

George Morrison, a skilled Ojibwe artist, grew up on the shores of Lake Superior, and by the age of nine was known for his drawing and creative talents. He graduated from the Minneapolis… Read More →

You know that a joke is a funny story that makes people laugh. A practical joke is different - it is a trick that is meant to be funny, but sometimes it is not very funny for the person who… Read More →