Showing titles in Science & Technology

There is no animal in the world that can run faster than a cheetah. Yet, no matter how quickly they run from trouble, cheetahs may not roam the African plains forever. They have lost much of their habitat to farmland, and some are killed by farmers who worry about their livestock. But cheetahs have important friends - like Dr. Laurie Marker and the Cheetah Conservation Fund in Namibia. Rosanna Hansen - who spent time working at the CCF - shares the fascinating story of cheetah preservation in this book young listeners will find irresistible.

Wer sich mit Einstein in einen Fahrstuhl begibt, lernt nicht nur den berühmtesten Physiker aller Zeiten kennen, sondern erlebt auch ungeahnte Abenteuer: Angenommen, das Seil des Fahrstuhls reißt. Dann zeigt eine Waage, auf der beide vielleicht stehen, nichts mehr an! Können sie dann überhaupt wissen, dass sie wirklich nach unten fallen und nicht etwa schwerelos im All schweben? Mit Experimenten und Versuchen zum Ausprobieren werden die Hörer anschaulich in die Grundlagen der Mechanik eingeführt.

This beginner's guide offers a first glimpse into the natural world of amphibians. In this addition to the acclaimed About series, educator and author Cathryn Sill uses simple, easy-to-understand language to teach children what amphibians are, how they look, how they move, what they eat, and where they live.

Before John Glenn orbited the Earth or astronauts walked on the moon, a group of dedicated female mathematicians known as “human computers” used their knowledge, pencils, adding machines, and writing paper to calculate the orbital mechanics needed to launch spacecraft. Katherine Johnson was one of these mathematicians who used trajectories and complex equations to chart the space program. Even as Virginia’s Jim Crow laws were in place in the early 1950s, Katherine worked analyzing data at the NACA (later NASA) Langley laboratory.

Grandma Dorothy shared her love of gardens with her daughter, Hillary, and her granddaughter, Chelsea. She taught them that gardens are magical places to learn, exciting spaces for discovery, quiet spots to spend time with family and beautiful areas to share stories and celebrate special occasions. But most of all, she taught them that in her gardens, her love grew and blossomed. Hillary Clinton and Chelsea Clinton team up to show listeners how sharing the things we love with the people we love can create powerful, everlasting bonds between generations.

What color are your eyes? Brown is the most common color. But some people have blue, green, gray, hazel, or amber eyes. What determines your eye color? Listen to this book to find out about how your genes affect your physical features.

Did you know people can turn the energy in rushing water into electricity? This hydropower can run the computer and the lights in your home. How exactly do we get it, though? And what is the impact on our environment? Listen to this audiobook to find out all about hydropower.

Every wonder how a vehicle weighing several tons can soar through the sky? This audiobook explains briefly why airplanes are able to fly and notes certain historical milestones in the field of aeronautics.

Golden lion tamarins are found only in Brazilian forests. These small, remarkable monkeys once had plenty of space to roam and claim family territories. But years of deforestation caused their numbers to shrink. They were in serious danger of becoming extinct. To help, scientists studied the animals in zoo settings. But they faced several mysteries. Why weren't golden lion tamarins reproducing in zoos? If scientists reintroduced zoo-raised tamarins to the wild, would those monkeys survive?

Want to know just how tall Mount Everest is? Or what the city of Denver's elevation is? Then look at a topographic map! These maps use lines to show the height and shape of Earth's surface. But how do you read the lines? And what other features do these maps have? Listen on to learn the ins and outs of topographic maps!

When winter ice covers the Arctic Ocean, a narwhal pokes his head through a patch of open water, his tusk—a six-foot long tooth—pointed to the sky. Join this mammal as he jousts with another narwhal, floats with his pod, and uses echolocation to find his prey. When warmer weather arrives, he will migrate towards summer ground. But he must be careful! Predators—orcas and polar bears—will be hungry and looking for a meal.... How will the narwhal escape? Will he be able to return to the winter bay?

Mercurio, Venus, Tierra, Marte, Júpiter, Saturno, Urano y Neptuno son los ocho planetas que giran alrededor del Sol. Unos viajan rápidamente y otros lentamente. ¿Qué más tienen de especial estos objetos del espacio?

¿Sabías que hay trozos de roca, hielo y polvo flotando en el espacio? Son cometas, asteroides y meteoroides. Giran alrededor del Sol como los planetas. Descubre en este libro lo que pasa cuando dejan de girar.

Vikings were fierce warriors who sailed the seas looking for new lands. They were expert sailors and shipbuilders. Find out the science behind their explorations, shipbuilding, and daily life. Discover how modern technology is being used to discover more about the lives of Vikings and their expeditions.

Gorgeous eyelashes. Flashy feathers. Silky hair. The animals in this book are far from drab and dull.

What do all the things you can see and touch in the universe have in common? Atoms! Made up of electrons, protons, and neutrons, atoms are so tiny you can’t see them without special microscopes.

What is it like to live in or visit South Africa? What makes South Africa’s culture unique? Explore the geography, traditions, and daily lives of South Africans.

How much do you know about Greta Thunberg? Discover the details you want to know about this inspiring young activist. You’ll learn about the childhood, challenges, and accomplishments of this young leader in the fight against climate change.

What is it like to live in or visit Japan? What makes Japan’s culture unique? Explore the geography, traditions, and daily lives of the Japanese people.

Spiders live everywhere! We even find them inside our homes. But how do they get way up on the ceiling? You have questions, and this book has the answers. Find out about spiders, including their body parts and behavior.