Best Inventions of 2007
From the phone that has changed phones forever, to futuristic cars, to a building made of water, to a remote-controlled dragonfly — a dazzling display of ingenuity
It's hard to find a filling station in space, but it's easy to find methane, abundant on many planets and moons. NASA is taking advantage of that with a methane-fueled rocket (above and in tests at right). Future probes could save weight by carrying a little fuel, then gassing up en routeÑjust like any
long-distance traveler.
Available: Prototype
nasa.gov
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