Theo Grey has a remarkable collection of pure elements, which he keeps in a giant, wooden periodic table. In this video clip, he shows off some of his most interesting specimens, and talks about how his collection got started. Grey is a co-founder of Wolfram Research and the author of The Elements, a wildly popular iPad app about the periodic table. He also writes a column about dangerous science experiments for Popular Science magazine.
This video was produced by the American Chemical Society.