Pete Black works for the St. Louis Zoo, where his primary responsibility is to perform routine exams and surgeries and provide preventative care to the zoo's 5000 animals. Black makes house calls to animals' enclosures and works within the confines of the 17,000-square-foot hospital. (Published in the November 2009 issue)

Engineers working on San Francisco's ill-starred Bay Bridge have fingered a culprit in the repair job that went awry Tuesday evening, forcing the bridge's closure: metal fatigue caused by harmonic resonance.

We sat down with the creator of Mario, Zelda, Donkey Kong, and scores of other Nintendo games to play the New Super Mario Bros. Wii game, and to talk about the birth of Mario and the future of video games.

Algae farmer Jes Sprouse an ambitious plan: tot fuel America as a tycoon of algae pellets and algae coal. Both products have nearly as much energy as coal, and they're a lot cleaner. (Published in the October 2009 issue)

A team at Harvard has found a way to capture the trickle of electricity that can be harvested from the metabolic reactions of bacteria in soil. This microbial fuel cell can power LED lights, making an inexpensive battery for use in the developing world. (Published in the November 2009 issue)