Episode: 2768 Percy Spencer and the microwave oven.  Today, our guest, NASA engineer Fitz Walker considers the Microwave Oven.

Episode: 3303 Painting wood grain to express alternate realities. Today, painting the swirls of wood grain.

Episode: 1291 In which sheet music offers a record of our country. Today, America's story spins out in the songs we sing.

Episode: 1290 Risk and vocation: when smart people look for safe lives. Today, we teach our best and brightest to avoid risk.

Episode: 1289 Those Vulgar Tubes: human waste disposal aboard old ships. Today, we try to keep ships clean.

Episode: 1288 Instability, self-control, and the metaphor of flight. Today, flight shapes yet another metaphor.

Episode: 2390 Lloyd Hall: Food Chemistry Engineer. Today, we engineer food.

Episode: 3243 Hollywood's Heroic Water FX. Today, water effects.

Episode: 2353 Reflections on -- or in -- the key of C. Today, French hornist Roger Kaza plays in C.

Episode: 1287 Transonic flight: piercing the sound barrier. Today, the sound barrier.