Caroline Arnold

Follow Wiggle and Waggle, two wormy best friends, through five wormy chapters as they dig in the dirt, work hard, and have fun swimming and singing. Beginning readers will dig the simple science facts included at the end of this charming book.

Describes the development of a baby penguin to its maturity.

The arctic wind howls, but the two polar bear cubs are warm inside their den. They snuggle tight against their mother and drink her milk. Three months later, they tumble outside for their first walk in the snow. Bundle up and find out what happens in a polar bear's world.

Hovering, gliding, diving -- how do birds do it? BIRDS: NATURE'S MAGNIFICENT FLYING MACHINES looks at how feathers, body structure, and wings vary from bird to bird. Readers will learn the mechanics of bird flight from takeoff to landing and discover how wing types meet the survival needs of each species. Popular science writer Caroline Arnold infuses this informative look at avian flight with her love of birds. Patricia J. Wynne's exquisitely detailed...

Have you ever wondered why you shiver when you're cold, or sweat when you're hot? It may seem natural that emperor penguins huddle together to stay warm in the Arctic, but why exactly does this prevent them from freezing? Is your dog just out of breath when he pants after running around outside, or does panting actually help him to cool down? In TOO HOT? TOO COLD?, Caroline Arnold, acclaimed author of nonfiction for young readers, answers these questions...

You haven't changed a bit! Living fossils, or modern-day animals that very closely resemble their ancient relatives. Meet the coelacanth, horseshoe crab, dragonfly, tuatara, nautilus, and Hula painted frog. All are living fossils. Why have they changed so little over time, while other animals evolved or went extinct? Using contrasting "then" and "now" illustrations, veteran nonfiction writer Caroline Arnold alternates between a prehistoric creature...