<img src="http://www.crunchgear.com/wp-content/uploads/2009/05/nyk_super_eco_2030.jpg" />
It looks like a vessel straight out of Star Trek, but it's going to be a real ship soon(ish). Japan-based Nip
<img src="http://www.crunchgear.com/wp-content/uploads/2008/12/auriga_leader_solar_ship.jpg" />
The world's first large ship to partly use solar energy to help power engine-related devices took to the