"Describes the invention and development of the "Jaws of Life." Includes glossary, websites, and bibliography for further reading"--Provided by publisher.

"Pilotless planes or "drones" have become an important aspect of modern military operations. Developed for espionage and warfare, pilotless planes are also used for public safety issues and can reduce injury or death rates for pilots"--Provided by publisher.

Where did our universe come from? People have been trying to answer this question for thousands of years. The twentieth century brough new discoveries in physics and astronomy that led scientists to develop the Big Bang theory-a detailed idea that describes how our universe formed. According to this theory, the entire universe began in a single instant, in an unimaginably powerful explosion. That explosion created all time and space, all matter and...

How are polar bears related to pandas? For thousands of years, philosophers and scientists have tried to organize and understand, or classify, the relationships among Earth's animals and plants. Early classification systems were cumbersome and inconsistent. In the late 1720s, Carl Linnaeus began developing a classification system to describe relationships among all living things, including animals, plants, fungi, and bacteria. This organization, called...

Outraged people claimed that Darwin's theory had made humans the relatives of monkeys. Scientists were sure that species changed over time, but no one could explain how. In the 1800s, Charles Darwin's studies of thousands of specimens of living things showed that no two individuals of any species were exactly alike. He realized that over millions of years, some individuals had traits that gave them an edge to survive and reproduce. As they reproduced,...

Since prehistoric times, people have wondered what causes disease. Early people blamed evil spirits. Later, disease was thought to be caused by an imbalance of bodily fluids. By trial and error, people discovered plants that cured certain ailments. But disease still spread through dirty, crowded cities. In 1546 an Italian physician proposed that tiny, invisible bodies cause disease. By the end of the nineteenth century, doctors had discovered the...

Since prehistoric times, people have wondered how the universe works. Early scientists studied how forces affect objects and watched how heavenly bodies move. In 1687 Isaac Newton published a set of laws that described the motion of all objects, both on Earth and in the heavens. By 1900 many physicists believed only a few questions remained to be answered. But the early 1900s brought revolutionary developments in physics. One was Albert Einstein's...

Philo Taylor Farnsworth was an American inventor and television pioneer. Although he made many contributions that were crucial to the early development of all-electronic television, he is best known for inventing the first fully functional and complete all-electronic television system, and for being the first person to demonstrate such a system to the public.

George Washington Gale Ferris, Jr. was an American engineer. He graduated from Rensselaer Polytechnic Institute in Troy, NY, where he was a member of the Rensselaer Society of Engineers, in the class of 1881 with a degree in Civil Engineering. He was made a member of the Rensselaer Polytechnic Institute Alumni Hall of Fame in 1998. He is most famous for creating the original Ferris Wheel for the 1893 Chicago World's Columbian Exposition.

Maiman was a graduate of the University of Colorado, which awarded him a B.S. in engineering physics in 1949. Later, he received his Ph.D. in physics in 1955 from Stanford University and began work at the Hughes Research Laboratory (HRL). There he concentrated on creating a device capable of converting mixed frequency electromagnetic radiation into highly amplified and coherent light of discrete frequency. Maiman later found that the accepted calculations...