cold fjord writes that Assistant Professor and lecturer Dave Conz has an interesting article at Slate, from which: "I believe beer is the perfect lens through which to examine innovation, which is why I teach a senior capstone course at Arizona State University called the Cultural and Chemical History of Beer. ... Home brewing is part of a broad spectrum of DIY activities including amateur astronomy, backyard biodiesel brewing, experimental architecture, open-source 3-D printing, even urban farming. ... Many of these pastimes can lead to new ideas, processes, and apparatus that might not otherwise exist. Depending on your hobby and your town, these activities can be officially encouraged, discouraged, unregulated, or illegal. For example, it's illegal to make biodiesel fuel at home in the city of Phoenix ... but not regulated in the bordering towns of Scottsdale, Chandler, or Tempe."