Describes the physical characteristics of penguins, looks at how they have adapted to life in a cold, watery environment, and discusses their different species, child-rearing behaviors, and threats to their survival.

Because it is closer to the sun than any other planet in the solar system, the surface of Mercury is extremely hot. Readers will discover what it is like on the surface of this small planet. They will also find out how the planet was discovered, what it is made of, and how scientists are working to learn more about it today.

"Learn how animals can be trained to assist people with a variety of different jobs."--

Presents information about Mars, discussing its physical characteristics, rotation, moons, and the human exploration of the planet.

This book helps to explore mammals, their adaptive features, habitats, relationship with humans and lots more.

"Read about the way hydraulic fracturing, or "hydrofracking," is used to harvest natural gas and learn how it has shaped our nation today"--Page 4 of cover.

"Learn how animals can be trained to work in healthcare positions or used for therapy."--

Introduces the planet Saturn, discusses its history, its composition, and its role in the solar system.

An introduciton to sea shells, discussing the different types of shells, where they are found, and how they are made.