Describes the scientific concept of sound and other related topics, such as vibrations, volume, and pitch, through the exploration of a guitar.

Learn what water is, how we use it, and why our world may be running dry.

This book describes how your eyes turn reflected light into images that your brain can understand and explains how, for people who need them, eyeglasses make the image clearer

The theropod group of dinosaurs saw the biggest, fiercest predators that ever walked the Earth - and also some of the smallest, which were nevertheless incredibly deadly for their size. Hundreds of kinds of these killers existed through the Age of Dinosaurs, from about 230 to 66 million years ago. In this book, readers can learn all about the world in which these predators lived, their physical characteristics, and how they hunted and survived.