Henry Carter Hull

A rubber duck floats in the tub. A rock sinks to the bottom of a lake. Why do some objects float and others sink? Find out in this series about materials and their properties. Informative, at-level text and engaging photos help readers understand the differences between objects that sink and float.

Did you know that scientists are able to build with atoms, the smallest building blocks of the universe? Nanotechnology is changing our future a few molecules at a time. Learn more about how scientists work with the tiniest objects imaginable.

On February 20, 1962, John Glenn strapped himself into the seat of the Friendship 7. He was about to become the third American in space and the first American to orbit Earth. Find out more in NASA and the Astronauts, one of the titles in the Space Exploration series.

Explores the fascinating world of robots. With colorful spreads featuring fun facts, sidebars, and a "How It Works" feature, the book provides an inspiring look at this exciting technology.

A pencil is stiff. A rubber band is bendable. Why are some objects stiff and others bendable? Find out in this series about materials and their properties. Informative, at-level text and engaging photographs help readers understand the differences between stiff and bendable objects.

A nail is hard. A cotton ball is soft. Why are some objects hard and others soft? Find out in this series about materials and their properties. Informative, at-level text and engaging photographs help readers understand the differences between hard and soft materials.

A piece of silk is smooth. Tree bark is rough. Why are some objects smooth and others rough? Find out in this series about materials and their properties. Informative, at-level text and engaging photographs help readers understand the differences between smooth and rough objects.

Every new and groundbreaking archaeological discovery refines our understanding of human history. This title examines the exploration and study of the Titanic's wreck. The book explores the ship's sinking, traces its discovery and scientific investigation, and discusses future study and conservation efforts. Well-placed sidebars, vivid photos, helpful maps, and a glossary enhance readers' understanding of the topic. Additional features include a table...

Find out how animals survive Earth's most extreme regions! From the rain-drenched treetops to the sun-starved forest floor, the rain forest is a tough place to live. But many animals from geckos to jaguars thrive in this environment. Discover the amazing body parts and behaviors that make living there possible. Filled with full-color photographs and engaging, easy-to-read text, Amazing Animal Adaptations are perfect for pre-readers and early reader...

CHANGES ON EARTH: This nonfiction, photo-filled science book for beginning readers describes the fast and slow changes on Earth. Readers will be captivated as they learn that Earth is constantly changing, sometimes in the blink of an eye, and sometimes over millions of years! SCIENCE READERS FOR CHILDREN: Look around at your environment. What do you notice? Earth is constantly changing, whether or not you can actually see it! Climb aboard as we explore...