Today is the birthday of Alexander Calder so it seems only fitting to feature him. Calder started out as an engineer and then made the switch to art in 1923. I think his background definitely shines through his work. This particular mobile was created out of scrap metal and piano wire. All of the shortages during World War II prompted Calder to use scrap metal and bits of wood for his work. Fun fact, Calder also worked with Martha Graham. He designed sets for her ballets and created a moving stage construction to accompany Eric Satie's Socrate in 1936. Want to learn more? Check out the Calder Foundation.