Tom Lehrer, the sharp-witted songwriter and mathematician known for his darkly satirical songs, has died at the age of 97. Rising to prominence in the 1950s and 60s, Lehrer's musical parodies tackled complex social and political issues with a unique blend of humor and intellect. His influence can be heard in the work of many prominent artists, including "Weird Al" Yankovic, Steely Dan, Randy Newman, and actor Daniel Radcliffe, all of whom have cited Lehrer as an inspiration. His cult following continues to appreciate his clever and often controversial lyrics.