Seattle-based Whooshh Innovations developed this salmon cannon to help fish pass over dams in seconds, rather than days. The giant tube sucks in migrating fish and helps them quickly, and safely, get to their spawning grounds.
U.S. states could face some hurdles as they experiment with road usage charging programs aimed at one day replacing motor fuel taxes, which are generating less each year, in part due to fuel efficiency and the rise of electric cars.
