We've seen solar-powered boats, and we've also seen bicycle powered supercomputers, lawnmowers, water purifiers and blenders. So wouldn't it make perfect sense to design a boat that has solar panelsand enables passengers to power it by pedaling? Alright, perhaps that's not the most obvious use of either technology, but that doesn't mean the concept isn't interesting! And while the design will probably never make it to production (it isn't exactly practical) here's how it would work: "The boat features a center cockpit where up to four passengers can sit, alternating pedaling duties in two-person shifts. When you get tired (which should be after only a few minutes), switching to solar power can help lighten the load."