Cell phones have changed the way people live, work, and communicate with each other. Since the first handheld phone was created in 1973, cell phones have only increased in popularity. This title delves into the science behind cell phones and the reasons for their popularity, from their portability to unique features, with full-color photographs.

Sunlight is a free, unlimited resource that hits the Earth with more energy in an hour than the people of the world use in a year. This title reveals how researchers are working on ways to harness the power of sunlight through solar panels and delves into the science behind these panels.