"Thousands of years ago, ancient engineers came up with a way to cross obstacles that prevented people getting from one place to another. They built a passageway under the ground called a tunnel. A tunnel sounds simple. After all, it is just a tube built through dirt or stone. But building a tunnel is one of the hardest challenges an engineer can face. This scientific text highlights the origin of the first tunnels, the greatest tunnel builders, the...

Discusses the history, development, habits, and care of Persian cats.

Text and illustrations provide a biograpy of naturalist John Muir.

Discusses the history, development, habits and care of Abyssinian cats.

Discusses the history, development, habits, and care of Siamese cats.

Chronicles the life and accomplishments of the conservationist who worked to protect land in the Lake Superior region and in the Alaskan wilderness. Readers will learn about Olson's birth in Norway, his immigration to the United States, his childhood in Wisconsin, and his later life in Minnesota. Olson's work on the National Parks Association and Wilderness Society are examined, and is his influence in drafting the Wilderness Act. Olson's work in...

Extraordinary environments endure through the efforts of conservationists such as Will Steger. In this engaging biography, readers will learn about Steger's childhood in Minnesota, his early interest in science, his trip down the Mississippi River to New Orleans, Louisiana at age 15, and his wilderness work in Alaska and Canada.

Most of the time, water is a good thing. However, too much water can be a very dangerous thing. Floods are deadly. Every year, thousands of people around the world are killed or injured in floods. Some people drown when they are swept away by the water. Others are killed by debris in the water. It is important to learn all you can about floods so you will know how to deal with this devastating disaster.

Discusses the history, development, habits, and care of the Ocicat, a domestic cat breed known for its wild appearance and pleasant personality.