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During the night, as we sleep, a beautiful celestial dance is taking place. While Earth seems solid and still, it's actually spinning on its axis and circling the sun. Joining Earth in this orbit around the sun are the other seven planets in our solar system, along with dozens of moons and millions of comets and asteroids. Containing our solar system is the wondrous Milky Way galaxy, with its billions of stars, just like our own sun, swirling and whirling around. And on from there are the billions of galaxies with their own stars swirling and whirling into the ever-expanding space called our universe. When the sun rises on a brand new day, the dance continues. Through lyrical text, award-winning science writer Suzanne Slade (June Almeida, Virus Detective! The Woman Who Discovered the First Human Coronavirus) takes young readers on an exploration of our solar system, galaxies beyond, and finally the universe as a whole. Back matter includes science facts.

Unnatural Disasters: Human Error, Design Flaws, and Bad Decisions (21st Century Skills Library)

Human modification of the environment always carries a risk of accident and folly. With this series, young readers explore the causes and consequences of some of the most major environmental catastrophes of the past 100 years. Guided by compelling questions such as, ""What led to these disasters?,"" ""Who was impacted by them?,"" and ""What changed in their aftermath?"" this interdisciplinary series blends social studies and science content. Ultimately, it pushes students to consider how humans can meet their need for resources in a safe, sustainable way. Books include table of contents, index, glossary, author biography, and timeline.

Unofficial Guides (21st Century Skills Innovation Library)

The Unofficial Guides series explores the various aspects of today's most popular games and programs including Apex Legends, LEGO Mindstorms, Fortnite, Minecraft, Animal Crossing, Among Us and more! Each collection covers topics ranging from basic to advanced. This series is perfect for the hands-on techie.

Unofficial Guides Junior (21st Century Skills Innovation Library)

The Unofficial Guides Junior series explores the various aspects of the enormously popular Minecraft™, Fortnite, Roblox, and Pokémon GO programs for younger readers. This collection, covering topics across the games in a clear and concise way,is perfect for the younger hands-on techie.

Unplug with Science Buddies®

It's time to turn off your device! This fun, maker-focused series features projects from project database creators, Science Buddies®, and encourages readers to step away from the screen and create with their hands.

Unplugged: Ella Gets Her Family Back

When Ella finally makes her move, it gets everyone's attention. At first there is some confusion--could Ella just want a cell phone of her own?†But Ella makes clear that what she really wants is her family back. Will they all agree that it's time to make some changes? And what word do you think Ella will use the next time she plays Hangman with her brother Carlos? This is a lively book about the issue of managing technology so that it can become more family friendly.

Unplugging (Fusion Books)

Set down the screens, step outside, and soak up the sun. LetÎs explore nature with tech-free outdoor fun! Kid-friendly activities using easily sourced materials make unplugging from screens and plugging into nature exciting. Easy-to-follow instructions paired with lively text, fantastic photos, and engaging illustrations are perfect for curious kids ready to investigate their world.

Unprovoked War, The: Russia’s Invasion of Ukraine

In February 2022, Russia invaded Ukraine in anticipation of a quick and complete victory. That did not happen. Instead, Russia’s brutal, unprovoked war has run into determined resistance from the Ukrainian government and people. Even so, Russia’s war on Ukraine has destroyed huge swaths of the country, including hospitals, apartment buildings, and schools. It has displaced millions and killed and injured thousands. Much of the global community has rallied around Ukraine, providing weapons and financial aid and imposing strong financial sanctions on Russia. Months into the war, no one could predict when it would end.

Unsolved Mysteries

The past is full of strange events, and some have left experts guessing. This fascinating series pairs short paragraphs of easy-to-read text with plentiful photos to help readers explore some of these mysterious occurrences, highlighting what happened and what people still don’t know.

Unspeakable: The Tulsa Race Massacre

Celebrated author Carole Boston Weatherford and illustrator Floyd Cooper provide a powerful look at the Tulsa Race Massacre, one of the worst incidents of racial violence in our nation's history. The book traces the history of African Americans in Tulsa's Greenwood district and chronicles the devastation that occurred in 1921 when a white mob attacked the Black community. News of what happened was largely suppressed, and no official investigation occurred for seventy-five years. This picture book sensitively introduces young readers to this tragedy and concludes with a call for a better future.