検索キーワード： 科学・テクノロジー

How can the moon or sun seem to disappear right before our eyes? When the moon, the Earth, and the sun align just right in their orbits, they can cause a solar or lunar eclipse! Find out how light and shadow work together to trigger these cool events.

Beliefs about the shape of the earth have varied over the millennia, but the Ancient Greeks were able to observe that our planet is round and even Eratosthenes attempted to measure its size. It was not until explorers had fully charted the globe that most people were really able to comprehend its spherical shape.

The Bakeys company uses a simple recipe to make edible spoons in the hopes of cutting down on plastic trash.

Some everyday problems can be solved using a series of steps called the Engineering Design Process.

For thousands of years, people have been using the engineering design process.

Al igual que los humanos, los delfines aprenden jugando, observando y experimentando. Algunos comportamientos aprendidos son cosas divertidas para pasar el tiempo. En diferentes partes del mundo los delfines han aprendido algunas técnicas de caza fascinantes. Sin importar si el comportamiento aprendido es enseñado de generación en generación o aprendido mediante la observación, esos delfines tienen habilidades de caza únicas que solo pueden encontrarse en esas zonas.

Al igual que las familias de los humanos, las familias de los animales tienen diferentes formas y tamaños. Muchos padres animales en la naturaleza tienen roles inusuales y generosos en la crianza de sus hijos. Mientras que algunos padres animales puede que nunca conozcan a sus descendientes, hay algunos que protegen y dan cobijo a sus pequeños. Otros alimentan o enseñan a sus hijos. Aprendamos más sobre cada uno de estos padres salvajes y sus tareas esenciales.

Nos preparamos en casa para enfrentarnos a desastres naturales y emergencias climáticas. Si se acercan vientos fuertes, inundaciones y tormentas de nieve podemos quedarnos (resistir) o irnos (evacuar). ¿Pero qué pasas cuando los zoológicos, acuarios o santuarios están en el camino de la tormenta? ¿Cómo se prepara el personal del zoológico para proteger a los animales? ¿Quién puede ir a ayudarles?

Marine mammals known as cetaceans are broken into two large groups: toothed whales (including dolphins and porpoises) and baleen whales. One group has a single blowhole to breathe air, the other has two. One group has tall dorsal fins to help maintain balance as they chase prey. The other scoops up water and prey in their large mouths as they swim slowly along—they don’t need large dorsal fins. One group uses echolocation, the other doesn’t. Learn more about what these animals have in common and how they are different in this latest installment of the Compare and Contrast Series.

We prepare at home for natural disasters and weather emergencies. If high winds, floods, and snowstorms are heading our way, we can stay (ride it out) or leave (evacuate). But what happens when zoos, aquariums, or sanctuaries are in the storm’s path? How do zoo staff plan to protect the animals? Who can come to help them after the storm has passed?

Just like human families, animal families come in all shapes and sizes. Many fathers in the wild have unusual and unselfish roles in the rearing of their offspring. While some animal fathers may never meet or know their offspring, there are some that protect and shelter their children. Others feed or teach their young. Let’s learn more about each of these Wild Fathers and their important duties.

Getting shots may not be any fun, but these vaccinations prevent dangerous diseases. Learn how vaccinations help keep us healthy.

Zombies have become a staple in pop culture. But where did the idea of zombies come from? According to biologist David Hughes, the culprit is nature itself.

Not all gasses are the same, some are heavier than others. But how can you tell which gasses are heavier and which are lighter? This experiment will prove which gas is heavier: air or carbon dioxide.

What is needed to create fire? Learn about the science behind fire and how fuel, heat, and oxygen all work together to create flames.

Check out these famous countries and regions that owe their shapes to an important geographic feature. These features help dictate so much about the countries they border.

Sam's mother shows him how the primary colors of light and the primary colors of pigment are different with a series of ingenious experiments.

Not all forest fires are bad. Controlled burns actually help keep the forest healthy, clear the way for new vegetation, and act as a pest control.

A quick tour of amazing man-made structures in China, Europe, and West Asia.

Explore the amazing world of animals by listening to "3,000 Animal Fun Facts for Kids and Their Adults." More than 3,000 fascinating facts about animals from all over the world are included in this fascinating book, which is a veritable gold mine of information. This collection of trivia is meant to amuse and inform listeners of all ages, and it offers endless hours of fun and learning. Listeners will go to the depths of the ocean and the magnificent African savannah on an exciting adventure through the animal kingdom.