検索キーワード： 科学・テクノロジー

Do your shoes fasten with Velcro straps? Have you ever wondered where this strange invention comes from? Sometimes nature provides excellent inspiration for new solutions! Plant burs stuck in his dog's fur gave Swiss engineer George de Mestral a good idea.

Kaboom! Find out how explosions are used to demolish large buildings. Demolition experts say it's the safest way. Learn why!

Have you ever wondered how the Hoover Dam was built? Follow along as the Colorado River itself tells you its story! A lot of work went into the construction of this giant dam, but it was worth it—we now have Lake Mead and a way of converting the river’s energy into electricity!

Do you know how new fruit is made? Learn about the different parts of a fruit plant’s flower—the stigma, pistil, and stamen—and how they use pollen to make seeds in a process called pollination! The seeds grow into new flowers, which turn into fruit after they’re pollinated!

From water, to paint, to breakfast cereal, who could have guessed that all of these things have metal in them? There's metal all around! This story includes a fun experiment to pull iron out of cereal.

Tugboats are tiny boats that fill a big role. Kids will discover how tugboat push and pull larger boats, like barges, through narrow waterways. Using a thick, strong rope, the tugboat guides big cargo boats through the harbor by helping to turn them.

Long before the Everglades became one of the largest wetlands in the world and a national park, it was covered by a warm, shallow sea. Across millions of years, sea levels dropped, the land below surfaced, and the area transformed into a thriving environment for unique plants and animals like mangrove forests and the Florida panther. By the mid-1800s, most of the indigenous people living in the Everglades had been killed or forced off the land. By 1900, Florida had become the nation's twenty-seventh state and had begun draining the Everglades to create land for farms and cities.

Have you ever wondered how a river forms, which animals live near rivers, or where those rivers lead? Rivers are a vital part of life and the ecosystem. Rivers help transport water to humans and animals as well. It can also be used to create energy. Water from rivers can end up in many different places downstream!

There are so many fun things to do outside during the summer! When the flowers bloom, there is flower fun for everyone! When their hollyhock ladies and daisy chains wilt, Lily Rose and her friend learn how to preserve flowers by drying them. There's always an adventure in nature!

Follow along with this class as they explore a creek near their school in Pennsylvania! They want to learn about the water and its ecosystem, so they perform a survey to determine its quality and biota. What do you think they will find?

When on land, rivers, lakes, and oceans appear flat. With the aid of satellites, these bodies of water appear to have many designs! Explore the art of nature and how satellites detect the temperature of the many bodies of water around the globe.

Red is a red blood cell. Luke is a leukocyte, or white blood cell. Patty is a platelet. What do these three have in common? They are the workers in your blood. Listen to find out why each worker is important for your body.

How did forgetting to wash a jar make cars safer? A scientist named Édouard Bénédictus accidentally dropped a plastic-coated flask that did not break. This invention was tested and engineered to help today's windshields protect drivers better.

Will an orange float or sink in water? Are heavier objects able to float in water versus lighter objects? Learn about the density of materials and how water affects the objects! Make your own scientific discoveries and expand your knowledge by conducting your own experiments with water.

Learn about how the body processes food by following Joe's pizza lunch—from the plate to his mouth to his stomach and beyond. The nutrients from food are absorbed in the small intestine, which are delivered to rest of the body.

Have you ever wondered where glasses came from? This book takes a fun look at the invention of glasses starting with the Greeks and Romans. Then it looks at attempts by the Spanish, Chinese, French, and even inventor Ben Franklin to improve the design.

Follow along this brief history of the pursuit of perpetual motion machines and how this endeavor led to the laws of physics we have today. From Robert Park's generator-rigged bicycle, to Robert Fludd's self-running bicycle, to the steam engines of the 19th century, these stories offer a peek into some of mankind's successes and failures when it comes to the exploration of science and advancement.

Your skin does a lot to make sure you are healthy and feeling good. It can keep you warm on a cold day, and cool on a hot day. It's tough and helps protect you from the sun. Its ridges help you grip things. Let's face it, your skin has you covered.

Where do all the metals on earth come from? They were all made by stars! In this science story, you'll discover how the fusion of atoms in dying stars in space creates enough heat and energy to make metals.

Aluminum was once more valuable than gold. A breakthrough in refining aluminum from rock transformed it from rare matter to sandwich wrapper. In this science story, you'll learn how two chemists, Charles Hall and Paul Héroult, solved the problem.