Animal Biology

Learn about endangered and threatened animals.

Like you, most animals have eyes. But how and what they see can be very different.

As recently as 11,000 years ago - "near time" to geologists - mammoths, mastodons, gomphotheres, ground sloths, giant armadillos, native camels and horses, the dire wolf, and many other large mammals roamed North America. In what has become one of science's greatest riddles, these large animals vanished in North and South America around the time humans arrived at the end of the last great ice age.

When Jennifer Doudna was a sixth grader in Hilo, Hawaii, she came home from school one afternoon and found a book on her bed. It was The Double Helix, James Watson’s account of how he and Francis Crick had discovered the structure of DNA, the spiral-staircase molecule that carries the genetic instruction code for all forms of life. This book guided Jennifer Doudna to focus her studies not on DNA, but on what seemed to take a backseat in biochemistry: figuring out the structure of RNA, a closely related molecule that enables the genetic instructions coded in DNA to express themselves.

As Laurel spent three years traveling the world in search of emotionally disturbed animals and the people who care for them, she discovered numerous stories of recovery: parrots that learn how to stop plucking their feathers, dogs that cease licking their tails raw, polar bears that stop swimming in compulsive circles, and great apes that benefit from the help of human psychiatrists. How do these animals recover?

Brr! Polar bears live in cold places. Learn other things about these animals inside this book.

A tree and your pet look nothing alike, but they have one thing in common—they are both made up of cells. Cells are really small. You can see them only with a microscope.

Peek! A baby prairie dog looks out of its underground burrow. Beginning listeners will discover why burrows make good homes for growing baby rabbits, meerkats, and other adorable animals.

New York Times best-selling author Jon Katz offers us a deeper understanding of the inner and outer lives of animals and teaches us how we can more effectively communicate with them, made real by his own remarkable research and experiences with a wide array of creatures great and small.

What animal has the biggest eyes? Why do elephants have enormous ears? This series explores different animal parts and demonstrates how and why these parts vary throughout the animal kingdom. Each title introduces listeners to four animals whose distinct body parts are unique and important.

Animals get their energy from the food they eat. Animals depend on other living things for food. Some animals, called herbivores, eat plants; while others are carnivores that eat other animals. Scavengers, like vultures and hyenas, eat dead animals. Learn how different animals eat and how this determines how they look and where they live. Can you name other animals that are scavengers?

In a tradition that runs from John Muir to Bear Grylls, Searles finds a fellowship with nature and a deeper meaning in the world of bears. Do bears understand things we don't? Are they dialed in to some greater natural force? Unlike us, bears waste little time on unreasonable fears. Bears are fully in the moment. They have an inner peace that seems to offset their power and strength. That may explain why no other animal on the planet is as revered as the bear.

This audiobook reveals the secret lives of salt marshes. Along the coasts, where ocean tides mix salt water with fresh water, nature has created salt marshes - soggy places full of natural wonders. For years, salt marshes were maligned, drained, or filled in. Now salt marshes are valued as the home of fascinating wildlife, including more than twenty different species of birds. Ornithologist and photographer Doug Wechsler takes the reader on a down-and-muddy tour of the year-round activity in these wonderlands.

Follow us on a journey around all the body parts of mammals, from eyes to ears, to legs to tails. Find out all about how each body part works, what it looks like and what it does and how each body part differs between species.

Follow us on a journey around all the body parts of reptiles, from eyes to teeth, to shells to tails. Find out all about how each body part works, what it looks like and what it does and how each body part differs between species.

Follow us on a journey around all the body parts of birds, from eyes to beaks, to feet to tails. Find out all about how each body part works, what it looks like, and what it does and how each body part differs between species.

Learn all about zebras!

Penguins glide, slide, and dive. Find out what else these birds can do!

Bite, chew, grind! Sharp beaked triceratops is hungry. With giant horns and a shield-like neck frill, this gentle giant can put up a fight. Learn more about this massive dinosaur in Triceratops: Three Horned Giant.

When it comes to battle, some animals seem to be natural warriors. They may have spines or armor to fend off predators, or horns made to attack. Enemies that mess with these animals are in for an unpleasant surprise.