Mentioning Jeff "Skunk" Baxter in another thread got me to thinking about musicians who've achieved success in unrelated fields. Baxter is a world recognized authority on missile defense and chairs a Congressional Advisory Board about that topic. Jason Mraz owns an organic avocado farm and supplies Chipotle with them. Not a musician but sultry screen beauty Hedy Lamarr in the 40s invented a radio guidance system for Allied torpedoes, used by the military later. Some of her inventions anticipated Bluetooth, WiFi and other communications technology. Other examples?