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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!.