*The Keeling Curve, a record of atmospheric carbon dioxide levels initiated in 1958 by Charles David Keeling of the Scripps Institution of Oceanography at the University of California, San Diego, with samples taken at the National Oceanic and Atmospheric Administration's Mauna Loa Observatory in Hilo, Hawaii.
*William Kelly's pneumatic iron refining process, patented in 1857, at the Lyon County Public Library in Eddyville, Kentucky, and at Murray State University in Murray, Kentucky.
*Edwin H. Lands invention of instant photography (also known by the companys name, Polaroid), at the former Polaroid Corporation Laboratory (now owned by the Massachusetts Institute of Technology) in Cambridge, Massachusetts.
*The discovery and isolation of phytochrome, a photoreceptive pigment in plants that controls their germination, growth, and flowering. Phytochrome was isolated in 1959 at the U.S. Department of Agriculture's Beltsville Area Research Center in Beltsville, Maryland.