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This volume: in Coral Reefs, we learn all about these tiny, adorable sea animals! This absorbing look at ocean science covers the biology of coral reefs as well as their ecological importance.

Do you have what it takes to live in one of the harshest places in the world? What if you had just a couple years to gain the knowledge you'll need to survive on your own? Join two curious polar bear cubs as they play, hunt, and navigate life in the Arctic.

Did you know that crows make their own tools, lead complex social lives, and never forget a human face? Scientists are just beginning to unlock the secrets of the crow's brain to discover how these avian Einsteins can be as smart as some primates, and even perform some of the same of the same cognitive feats as human children! Crows have problem-solving skills that will make you you rethink what it means to be a bird brain!.

"Turn back the clock with History Comics, First Second's new nonfiction graphic novel series! In this volume, learn how wild mustangs were first introduced to America and how they still roam free today.

"A paleontologist and a storyteller take two children through the birth of our planet to the present day, covering major geological periods and the evolution of life on Earth"-- Provided by publisher.

"In the early 18th century the American prairies shook under the hooves of nearly 30 million bison.

"Earth is home to trillions of germs. But for most of human history, people didn't know they existed! Learn how the microscope changed everything, allowing scientists to see germs-and discover their surprising benefits"--.