Showing titles in Earth Sciences

The sun shines bright during the day, but why can't you see it at night? Follow the patterns of the sun and Earth to learn what causes day and night.

Zebras travel across the Kalahari Desert each spring in search of food. Whales swim to warmer water every winter. Take a journey to discover the wonders of migrating animals, including why they migrate and how far they travel.

„Woraus besteht die Erde?“ „Wo steht der Stall von Prillan?“ „Warum fallen wir nicht von der Erde?“ „Wo sind die meisten Menschen?“ „Welches ist die tiefste und höchste Stelle auf der Erde?“ „Wieso sind Wälder wichtig?“ Der kleine Kater Findus will unendlich viel wissen und fragt dem alten Pettersson immer wieder Löcher in den Bauch. Zum Glück weiß Pettersson auch auf die kniffligste Frage eine spannende Antwort.

Jeff and his cousin Liz are waiting to see the solar eclipse! Together, they learn about why eclipses happen and why seeing one is special. Do you know why eclipses happen? Learn how the moon and sun interact with Earth in order to create this solar spectacular!

Artificial replacement joints have to be tough and extra smooth. That’s why doctors use replacement joints made with the same long-lasting and strong stuff as sapphires and rubies, a natural mineral called alumina. Learn more about why this gemstone is perfect for making new joints!

Follow Detective Dobson as he investigates Earth's greatest "mass murderer" that led to the greatest extinction event in Earth's history nearly 250 million years ago. Dobson will travel the world investigating fossils—the evidence left behind by the killer that was left behind in the Earth’s crust. Who really was the killer? Was it a Volcano, Climate Change, Poisonous Gas? Help Detective Dobson find the real suspect with paleontology and geology! Will Dobson ever be able to truly find the killer?

What animals do you think live in the desert? Follow Click and Jane as they travel through the desert. Not believing anything can live in the hot, dry desert, Click quickly learns that plenty of creatures make their homes in the desert. As the pair is introduced to different birds, plants, reptiles, coyotes, and owls, Click and Jane are able to come to appreciate the desert.

Have you ever wondered what it would be like to stand next to a real dinosaur? Millions of years ago, Dinosaurs ruled the earth and left their fossils behind for us to find all over the world. These fossils help archaeologists and paleontologists learn about what dinosaurs may have looked like. Some were really big and some were really small. In this story, you will learn all of the different shapes & sizes of your favorite dinosaurs before they went extinct. How will you measure up next to your favorite dinosaur?

Have you ever wondered why it gets dark at night? Listen to learn about how the Earth’s spinning changes day into night and why some days are longer than others.

Did you know that Hawaii is still being built, even today? Heidi learns all about how Kilauea, the most active volcano in the world, erupts and spills more lava every day, making the island grow! She also gets to visit Mauna Loa, the biggest mountain in the world. What do you think it might be like to visit?

Have you ever visited the Grand Canyon? As one of the world’s seven wonders, millions of people have visited this landmark. Have you ever wondered how it was formed? Learn how the 3 "R"s- Rock, Rivers, & Erosion, have led to the formation of the Grand Canyon and the changes it undergoes in present day.

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.

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!

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?

Deep underground, unseen forces are at play to move the continents around our globe.

How is lightning created? And what is thunder? What kind of weather creates the most lightning? This science story shows how lightning is like the spark from static electricity, but much bigger.

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.

Every visitor of Yosemite National Park in California should say "thank you" to one man: John Muir.

John Wesley Powell was known for his explorations of the canyon land area of southern Utah and northern Arizona, still "unknown" in the 1860s.

Stretching across the Great Plains, Tornado Alley has the perfect weather conditions for forming tornadoes.