The human respiratory system is what makes people able to breathe. This detailed guide explains w...

This book provides lists of key people, sites, cities, plants and animals, political figures, ind...

Gladiators were the superstars of the Roman Empire. However, their lives were bloody, dangerous, ...

How can two things that are about the same size, such as a bowling ball and a teddy bear, have su...

Magical phenomenon, pagan worship, sorcery, and religion have all at one time been thought of as ...

An introduction to having a guinea pig as a pet that discusses how to choose the right guinea pig...

Describes the fascinating details of the human body that are too small for the unaided eye to see...

This book focuses on Daniel Boone an American pioneer, explorer, and woodsman who is credited wit...

Alchemy is an idea based on superstition and philosophical global traditions spanning hundreds of...

The third edition of this popular series is updated with a variety of features that will help stu...

Around the world, young people under the age of eighteen serve in militaries and as part of armed...