Theodore Gray is the author of Popular Science's "Gray Matter" column.nbsp; He is the co-founder of Wolfram Research and co-creator of the technical computing software Mathematica.nbsp; He is also the creator of the wooden periodic table and of the self published photographic periodic table poster, which has sold more than 46,000 copies to date.nbsp; His web site can be visited at www.theodoregray.com.nbsp; He lives in Champaign-Urbana, IL.
Nick Mann is a freelance photographer working in Central Illinois.nbsp; Aside from having photographed more elements than probably anyone in the world, he is an accomplished landscape, sports, and event photographer. nbsp;