Meet cancer research Len Zon in these videos from the NOVA's "The Secret Life of Scientists & Engineers." Len studies zebra fish to better understand the biology of cancer tumors. The gene set of the zebra fish is similar to humans. The fish are transparent, revealing internal organs. Len is also a musician, playing the trumpet and the shofar, a ram's horn. This resource is part of the NOVA: Secret Life of Scientists & Engineers Collection.