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What do you want to be when you grow up? When Katherine Johnson was young, women weren't expected to go into the math and science fields. After studying math in school and teaching for a few years, she learned that the organization that would later become NASA was hiring women to complete mathematical equations. As an African-American woman, Johnson had to work hard to earn the respect of her coworkers, but they soon came to rely on her brilliant calculations. Learn how Johnson broke barriers as a female African-American mathematician.

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?

At the start of the twentieth century, Marie Curie, a Polish physicist and chemist, stunned the scientific world. Her research led to the discovery of two elements, polonium and radium. She also examined the most unusual property of these elements: radioactivity.

Bacterial infections are a constant threat to human health. Antibiotics stop a bacterial infection from multiplying. They help treat pneumonia, strep throat, and many other infections. But before antibiotics, treatments for these diseases were limited or misguided. In 1929, the accidental discovery of the first antibiotic, a bacteria-killing liquid called penicillin, kicked off a medical revolution. The use of this new treatment has saved countless lives, from World War II soldiers to modern hospital patients. Explore current issues in antibiotics and the best ways to fight bacteria.

A dog says “bow, wow” in English and “hav, hav” in Hebrew. Whimsical animals in American and Israeli settings compare their varied noises and sounds. Listeners can explore which sounds are the same and which are different in droll depictions of animals in Israel and the United States. Basic Hebrew vocabulary, including animal names and sounds, are introduced. Iconic locations like Capitol Hill and Central Park in the United States, and the Dome of the Rock and the Sea of Galilee in Israel are featured in illustrations.

Acclaimed science author Sandra Markle offers a fascinating look at Gobi bears - the rarest bears on the planet. These adorable animals face threats ranging from illegal gold miners to climate change. Find out more about these bears, which are considered a national treasure in Mongolia, and learn what scientists are doing to help this critically endangered species.

We can't see the wind, but we can feel it. Strong, gentle, warm, or cold, windy days can cause many changes. In this introductory book, listeners will discover how the wind affects our world and the way people can use the wind.

Sloths spend most of their lives in trees, and until recently, scientists didn’t know very much about them. But Dr. Rebecca Cliffe was determined to discover their secrets. To find out more, she fitted sloths with special backpacks containing a device to track their activity. She learned how to climb trees in the Costa Rican jungle so she could take sloth hair samples and test their DNA. And she’s helped create sloth crossings and plant trees to ensure the sloths aren’t trapped in shrinking territories. Along the way, she earned the nickname Dr. Sloth.

Gymnast Simone Biles won four Olympic gold medals in 2016, and she plans to compete at the Olympics again in 2021. Engaging text and critical-thinking questions will make this book a hit with young gymnastics fans.

Did you know that street skateboarders perform incredible tricks by creating obstacles out of structures you might find along a city sidewalk? Street skateboarders jump their boards onto curbs and stairs. They grind down railings. They flip their boards around with their toes.

The world is changing for two girls in China in the 1970s. Da Qin - Big Piano - and her younger sister, Xiao Qin - Little Piano - live in the city of Wuhan with their parents. For decades, China's government had kept the country separated from the rest of the world. When their country's leader, Chairman Mao, dies, new opportunities begin to emerge. Da Qin and Xiao Qin soon learn their childhood will be much different than the upbringing their parents experienced.

When Tantoh Nforba was a child, his fellow students mocked him for his interest in gardening. Today he's an environmental hero, bringing clean water and bountiful gardens to the central African nation of Cameroon. Authors Miranda Paul and Baptiste Paul share Farmer Tantoh's inspiring story.

Evan has always dreamed of being a superhero, and on his 16th birthday he discovers the ability to stretch and bend his body in impossible ways. He decides that's it's time to make the most of his super stretchiness and become a real-life superhero - except he can't find any crime to fight. When a video of his superpower goes viral, Evan gets a taste of the fame he has hoped for, but he knows he hasn't really done anything besides a few cool tricks. After an accident on the freeway causes everyone to look to him for help, Evan will learn if he's truly up to be the hero he wants to be.

Great white sharks can weigh thousands of pounds, and their enormous tail fins send them zooming through the water in pursuit of prey. Find out how these top predators hunt and raise their young.

Pangolin rescuers and researchers such as Thai Nguyen have the difficult task of saving pangolins, changing local laws to prevent poaching, educating local communities, and learning more about these mysterious creatures.

Are you a good teammate? Do you try your best? Do you follow rules and play fair? We don't have to be the best at every sport to have a good time. Trying our best will make the game way more fun! Pairs with the fiction title Dev Tries His Best. Explore these and other ways to be a good sport with these fun books!

¡Cici está lista para todas sus actividades de campamento favoritas! Tiene todo planeado para el viaje con su papá, su hermana y su amiga Kendra. Pero con los nuevos poderes de hada de Cici, la naturaleza le tiene preparado mucho más de lo que ella esperaba. Un error en el sitio de acampar, una tormenta y un duendecillo del bosque ponen a prueba su buena disposición. ¿Podrá ver Cici la magia de las sorpresas antes de que todo el viaje se arruine?

Tizzy the dreidel has a problem. Spinning makes her dizzy. But with encouragement from a little girl, Tizzy bravely sets out on an eight-day spinning Hanukkah adventure all around the house!

Deborah has a gift; she can see the future. As Deborah grows up, so do the date palms that surround her home. Under these trees, people come from far and wide to seek guidance from the great prophetess and judge. In her dreams, Deborah foresees danger to the people of Israel. She summons a general to speak with her beneath the date palms. "War is coming and you must prepare," she tells him. For the girl that grew up under the date palms, her moment of destiny has arrived.

Ketem the cat is looking for a new home. Professor Buber’s house looks like a good place to live, but the local cats tell Ketem the famous writer doesn’t want any pets. He once let his cat distract him when a man came to him for advice, say the cats. Since then, no more cats, they say. But Ketem has a plan to make Professor Buber's house his own, and enlists a group of neighborhood cats to help. Based on the true story of Martin Buber's cats.