Did you know that mammals are warm-blooded animals? African elephants are the largest land mammals. Discover these and other interesting facts in Mammals.

Did you know that the U.S. Army is older than the country it serves? It has more than 1.3 million active duty members. Discover these and other interesting facts in Army. Army is part of the new EYEDISCOVER collection of AV2 books.

Did you know that parasites live on or inside their source of food? Many parasites can be dangerous to their host. Discover these and other interesting facts in Parasites.

Did you know that koalas only eat leaves from one type of tree? Goats can eat many different plants. Discover these and other interesting facts in “Herbivores”.

Did you know that many people live and work in neighborhoods? Police officers make sure people follow the laws. Discover these and other interesting facts in Careers in My Neighborhood. Careers in My Neighborhood is part of the new EYEDISCOVER collection of AV2 books.

"Did you know that koalas are known for carrying their babies in pouches? Baby koalas are called joeys. Discover these and other interesting facts in Koala"--From the publisher's web site.

Did you know that some animals sleep all winter to stay warm? When it is summer in some places, it is winter in others. Discover these and more intriguing facts in Seasons.

Did you know that fish have lived on Earth for millions of years? There are more than 30,000 kinds of fish. Discover these and other interesting facts in Fish. Fish is part of the new EYEDISCOVER collection of AV2 books.

Did you know that giraffes are the tallest animals that live on land? A group of giraffes is called a tower. Learn these and other interesting facts in All About Giraffes.

Did you know that polar bears spend more time underwater than any other bear? Polar bears live in the Arctic where it is very cold. Learn these and other interesting facts in “A Polar Bear's World”.