As the world's population keeps growing, finding sources of food has become more important. Readers discover how challenging it is to produce crops that are healthy for both people and the environment. They learn the methods being used...

There is much more to space than just the planets and the stars. This book takes readers deep into space to discover fascinating facts about our solar system and beyond. They learn about everything from comets to lunar landings and...

Young eco-conscious learners will love reading about carbon footprints. Energy comes from many different sources, but some of them are quickly depleting. Readers explore the different ways to replace fossil fuels, such as solar energy...

Presents important inventions that have changed the world, such as the television, semiconductors, and rockets, and includes instructions for building models of the inventions.

Presents early inventions, such as the astrolobe, stained glass windows, and kites, with instructions on how to build them out of ordinary materials.

Presents how and why various technologies were created, such as the sundial, spoked wheels, and block printing, and gives instruction on how to create these things out of ordinary materials.