The use of grooved rollers to transport goods may have led to the invention of the wheel in ancient times. Humans have used boats for water transportation for at least 50,000 years. Examine significant developments in land and water vehicles in Land and Water Transportation, one of the titles in the Technology and Innovation series.
Explores the scientific history and future of energy and matter. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.
The simplest machines are the lever, wheel and axle, pulley, ramp, and screw. The electric motor was first invented in 1832, and was used commercially for the first time 41 years later. Examine significant developments in the generation and use of power in Power and Energy, one of the titles in the Technology and Innovation series.
One of the earliest known medical documents was the Book of Thoth, from ancient Egypt. In the 1800s, microbiologists Louis Pasteur and Robert Koch helped develop germ theory, changing the way people understood diseases were spread. Examine significant medical developments in Medicine and Health, one of the titles in the Technology and Innovation series.
People have been building temporary shelters for at least 40,000 years. Since the Industrial Revolution in the 1750s, many people around the world have moved to cities. Examine significant developments in construction technology in Buildings and Structures, one of the titles in the Technology and Innovation series.
The earliest successful human flights were conducted using lighter-than-air balloons. Today, modern aircraft wings use a principle known as the Bernoulli effect to generate lift. Examine significant developments in air and space technology in air and space, one of the titles in the technology and innovation series.
The first weapons of war are believed to have been wooden maces with stone heads. Today, computers are used in modern warfare to break codes, communicate, and spy on enemy forces. Examine significant military developments in military and security, one of the titles in the technology and innovation series.
