Ross Evans is a genuine tinkerer and became a prolific and diverse inventor when he was an undergraduate in college. Among his brainchildren were an underwater breathing system for capsized kayakers, a kids fort-building system now sold by Cranium, and an innovative wall system for quickly partitioning rooms. But EvansÍs primary passion is bicycles, and one of his inventions in this area led to his career as the founder of Xtracycle, where heÍs pedaling a ñbicycle lifestyleî by turning bikes into versatile cargo vehicles (they can also power small appliances). In the developed world, ñsport utilityî bikes enable healthy fun. In poorer countries, they could also be the most practical option for moving goods and people.