red gas / metal foil / electricity / food producers / discovered energy source / chemicals / radio communications / invisible energy / food / energy / /
NaturalFeature
Apollo Telescope Mount / /
Organization
National Archives and Records Administration / /
Person
Michael Faraday / Lewis / Isaac Newton / Clark / Jim Franciscus / Thomas Jefferson / Johannes Kepler / Nicolaus Copernicus / /
Position
astronaut / president of the United States / scientist / /