Animals make perfect counting company! The simple language teaches young readers mathematical terms and counting concepts. Learn to count by 2s up to twenty wit

The Adélie penguin is one of the best-studied birds in the world and is the subject of research programs from a dozen nations interested in monitoring changes

"Concepts of game programming are explained well, and no prior knowledge of Swift language programming is required. ... The images and audio provided are profes

Penguin Biology is the first broad-based collection of biological and ecological studies of these unique birds to be published since 1975. Topics have since bec

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