Provides an introduction to the medieval castle, its layout, and the lifestyle of its defenders.

Describes the skeletal system and outlines the many important roles that bones play in the healthy functioning of the human body.

Details the life cycles of frogs and toads while introducing different species that can be found around the world.

Join award-winning science writer Seymour Simon as he explores one of the most important systems of the human body: the digestive system! Ever wonder how food like pizza or spaghetti moves through our body? It all happens in our digestive system, otherwise known as our guts. Working twenty-four hours a day, it makes sure the food we eat turns into energy, nutrients, and waste. In this revised edition, featuring clear text and stunning full-color photographs,...

"Everyone is affected by climate change. Reading Climate Action: What Happened and What We Can Do is the perfect introduction not only to the dramatic effects of climate change, but to the solutions. Learn how our behavior and actions have led us to this point, hear from kids around the world dealing with extreme storms, wildfires, and sea level rise, and discover what scientists, youth activists, and ordinary citizens are doing to protect their communities."--Provided...

Imagine exploring the most extreme parts of our amazing planet—trekking though the driest desert, climbing the snowiest mountaintops, and diving to the deepest regions of the ocean floor. Seymour Simon, the dean of children's science nonfiction, investigates Earth's biggest, smallest, deepest, and coldest environments, animals, plants, and most severe weather. These mind-bending facts and photographs invite readers on an exciting, and sometimes...

An introduction to the physical characteristics, behavior, and life cycle of different kinds of spiders.

Describes the expansion of the universe as a result of The Big Bang.

Explains new discoveries about the universe made possible by the Hubble Telescope.