Robodoc

She already had her dream job designing electric cars, but sometimes dreams change. Catherine Mohr wanted to save the world, or at least a piece of it. But she just wasn´t sure how to go about it. At age 27 she had what most engineers would consider a dream job: product engineering manager at AeroVironment, a boutique firm in Monrovia, Calif., that designs and builds some of the world´s most advanced land and air vehicles. She´d helped build cars for Switzerland´s Tour de Sol and Australia´s first World Solar Challenge, worked on power trains for hybrid cars, supervised construction of a hybrid off-road military reconnaissance vehicle, and started a laboratory to develop fuelcell systems for aircraft designed to stay aloft for months at a time.