Oil, also known as petroleum, is one of the most significant sources of energy in an energy-hungry world. Every day, more than 80 million barrels of oil are used in…

No athlete wants to break a bone on the field, but injuries are bound to happen when playing sports. Learning what steps to take and how to recover from serious…

The seventh planet from the sun, Uranus is known for its blue-green color and tilted axis, which makes it look like it’s spinning on its side. What causes these distinctive…

Young readers learn about the Great Dane, its history, and personality.

One major adaptation of mammals is part of what differentiates them from other animals: the growth and nourishment of babies inside the mothers body. Water-repelling fur, tough hides, camouflage, as…

Igneous rocks are often portrayed as the result of one of Earths most exciting eventsa volcanic eruption. While some may form that way, igneous rock on Earth can form much…

Mammals take care of their young and live in groups, from a pride of lions to a passel of opossums, but even though mammals have features in common, the physical…

Containing photographs and historical illustrations of Santa and his reindeer, this volume explains how these beasts came to be a symbol of the Christmas season.