Video: Navy UAV uses hydrogen fuel cells for greener surveillance

[Via PhysOrg]
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It's often been said that where there's water there's life, but NASA now looks to be seeing if the same can also be said of good 'ol methane, with New Scientist reporting that researchers at the agency have drawn up plans for a rocket plane that could one day sniff out sources of the gas on Mars. If it's given the go ahead, the plane would parachute down to Mars before being cut loose at an altitude of 1.5 kilometers, when the plane's rockets would kick it send it skimming across the Martian surface. On board sensors would then be able to detect methane at levels as low as a few parts per billion, as well as determine the source of the gas, which some speculate could be living micro-organisms. Of course, there's no indication of when that might take place, with the plane already failing to make the shortlist for NASA's 2011 Mars Scout mission.
The folks who keep planes from crashing into one another over at the FAA were none too pleased to read about that little UAV demo conducted by the L.A. County Sheriff's Department this weekend, with the agency telling Sheriff Lee Baca and company to keep their drone grounded pending the result of an investigation. What's more, the department could actually face disciplinary action for the SkySeer's inaugural flight -- FAA spokesperson Laura Brown commented that although the agency wasn't "peeved," they were "definitely surprised" that authorization had not been requested for the trial. Commander Sid Heal, point man for this program tasked with 






