Carol Hand

Space is a vast and mysterious place. There are many environmental challenges, including enormous distances between planets and moons, lack of air and gravity, extreme cold, and radiation. This book presents these problems and examines the technologies developed so far to overcome them and make living in space possible. Through compelling text and impactful photographs, readers will learn about past space travel, life on the International Space

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"Polio once frightened parents every summer. The disease could suddenly leave children paralyzed. But in the 1950s, scientists developed a vaccine that nearly eliminated the disease. Polio explores the history and science behind this disease, as well as how it's treated. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources,...

This book explores what we know about fish evolution, from theories of the past to recent breakthroughs in research, and also looks at the science behind the research, from studying fossils to analyzing DNA. -- Adapted from publisher's description.