Lasers are used today in everything from CD players to satellites. Lasers, explores the scientific concepts behind these super tools in easy-to-understand language while exploring the history and development of these miraculous inventions.
The basic unit of all living things, the cell is a world in itself. This book explores the workings of plant and animal cells -- what they look like, how they're nourished, and how they reproduce. It also describes the role of disease cells in the human body, and how new knowledge about cells provides hope for the treatment of illnesses such as cancer and muscular dystrophy.
Discusses the discovery of atoms and how they work, nuclear energy and weapons, nuclear radiation and its medical uses, atomic clocks, and other applications.
Plate Tectonics is the study of the forces that cause continental drift. When tectonic plates collide or move apart, mountains are formed, volcanoes erupt, and earthquakes occur. These huge plates move one to four inches a year, yet we see and experience effects of that movement every day.
Tornadoes are among the most violent and destructive weather events on earth. "Tornadoes "investigates these violently rotating air columns that oftentimes destroy houses, sweep school busses into the air, and reduce brick buildings to rubble.
Human beings have dreamed about traveling beyond Earth for thousands of years. This fascinating volume tells about those early dreams, then examines the development of human flight, rockets, and the first space stations, as well as present plans for exploring the solar system, and the possibility that humans will someday reach planets orbiting other stars.
In the early 1600s, the Italian mathematician Galileo became the first person to apply a new invention-the telescope-to study the heavens. This informative volume explains how telescopes work and traces their history, along with the major discoveries they made possible, from Galileo's time to the present. The final chapter deals with present and planned space telescopes.
Scientists believe that more than 13 billion years ago the universe was born in a titantic explosion-the Big Bang. It has been expanding ever since. This volume, aimed at basic readers, explores the evidence for this momentous event, as well as glances far ahead into alternate futures in which the universe either keeps expanding or reverses course and contracts.