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| Site of the first sustained, powered flight |
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| Pioneers of sustained, powered flight |
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| Wilbur and Orville Wright |
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| The first inexpensive, dependable, mass-produced car |
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| Major communications medium from the 1950s on |
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| Worldwide linkage of computer networks |
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| Portable, wireless, handheld telephone |
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| Personal, electronic messages |
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| These two sources replaced kerosene for lighting. |
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| natural gas and electricity |
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| Major communications medium in the 1930s and 1940s |
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| Innovative addition to motion pictures in 1927 |
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| Ford's method of producing cars |
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| the assembly line (or mass production) |
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| Tiny devices that control electronic signals |
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| Device that produces a thin, intense beam of light |
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| Miniature electronic device consisting of thousands of transistors on a single chip |
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| Type of engine powered by batteries |
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| Most common semiconductor material; nickname of a valley in California |
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| Devices that do jobs too boring, difficult, or dangerous for people |
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| Mass production made these much more available and affordable. |
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| Type of engine that replaced steam for trains and ships |
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| Solid material that conducts electricity and is used to make transistors |
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| Faster, smaller computers that replaced the first computers |
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| "second generation computers" (personal computers) |
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| Devices that reduces harmful automobile emissions |
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| Famed German scientist who revolutionized physics |
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| Einstein's theory about space and time |
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| Center of the atom, first described by Rutherford |
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| Idea that the universe began as a result of an explosion |
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| Elementary particles; the opposite of ordinary particles |
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| antimatter (antiparticles) |
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| High-energy particles from outer space |
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| Ability of some metals to conduct electricity with no resistance at temperatures near absolute 0 |
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| Tiny subatomic particle with positive charge, discovered by Rutherford |
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| Einstein's famous equation |
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| Study of the Earth based on the principals of physics |
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| Physicists found more and more of these particles after 1945. |
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| Glass filaments that transmit data via light pulses |
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| Italian-born physicist whose team achieved the first controlled nuclear chain reaction |
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| Planck's theory that energy is released in definite packages |
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| Englishman who disintegrated atoms, showing they were not solid |
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| Small, rapidly rotating star that emits radio waves |
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| Extremely luminous object at the center of a distant galaxy |
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| Particle that may be the basic subunit of neutrons and protons |
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| Idea that the Earth's outer shell consists of rigid, moving plates |
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| the plate tectonic theory |
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| Device used to create high-velocity beams of subatomic particles |
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| Treatment of disease with chemicals, often used for cancer patients |
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| Units of heredity, identified around 1910 |
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| Vaccines were developed in the early 1950s for this dreaded childhood disease. |
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| Incurable disease of the immune system, first identified in 1979 |
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| Term for the use of disease-causing agents by terrorists |
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| The study of inborn characteristics and their inheritance |
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| Cell structures that contain genes |
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| Creation of an identical copy of a living organism using DNA |
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| The substance that carries genetic information |
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| Drugs that fight disease-causing microbes |
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| Computerized axial tomographic scanner; takes cross-sectional X rays of the body |
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| Delicate surgery that uses microscopes |
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| Brain disorder involving memory loss, a concern of older people |
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| Surgical replacement of a diseased body organ |
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| Field of medicine that focuses on genetic diseases |
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| Technology that produces images of the body's internal organs |
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| MRI (Magnetic Resonance Imaging) |
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| Altering of an organism's hereditary makeup |
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| Project devoted to mapping all human genetic material (DNA) |
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| The study of extremely low temperatures; used to freeze living body parts |
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| Doctors who specialize in care of newborn infants |
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| The first artificial satellite sent into Earth orbit, in 1957 |
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| The U.S. manned spacecraft designed to be reusable |
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| Huge industry that designs and builds space equipment |
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| Space shuttle that exploded in 1986 |
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| the National Aeronautics and Space Administration (NASA) |
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| The first men on the moon |
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| Neil Armstrong and Edwin Aldrin |
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| The moon-landing flight satellite |
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| The first U.S. space laboratory |
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| First man to circle the Earth in a spaceship |
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| First American to circle the Earth in a spaceship |
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| Satellite on which a crew lives for an extended period |
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| Unmanned spacecraft that explore other planets |
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| The first communications satellite |
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| First planet to experience a satellite landing |
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| Soviet space station that plunged into the Pacific Ocean in 2000 |
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| Orbiting astronomy tool launched in 1990 |
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| the Hubble space telescope |
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| Radiation belt that circle the earth, discovered by satellites and probes |
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| U.S. and Soviet spacecraft that linked up in 1975 |
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| The first animal sent into space, a Soviet dog |
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| The first U.S. space shuttle |
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