The Elements, Molecules, and Reactions, as well as Theodore Gray's Totally Crazy Science, are written by Theodore Gray. He is the inventor of the bestselling iPad apps Elements and Molecules, both of which were chosen Apple's App of the Week, and was the Director of Disney Animated (which was also named iPad App of the Year by Apple). Gray made multiple appearances on stage with Steve Jobs as a software developer. He was also a co-founder of Wolfram Research, Inc., which produces the popular Mathematica program and the Wolfram Alpha website. He currently resides in Urbana, Illinois.