MichaelCallahan
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NASA finds DNA components in meteorites, says they originated in space (video)
So, this is kinda wild: scientists at NASA have uncovered new evidence that DNA components found in meteorites can originate in space, lending new credence to the theory that life on Earth may have arisen from a pre-existing "kit" of materials delivered via asteroid. The discovery is outlined in a new paper from Dr. Michael Callahan, whose team of researchers closely analyzed samples from 12 different meteorites, using a mass spectrometer and liquid chromatography. In their samples, they found traces of adenine, guanine, and a variety of molecules known as nucleobase analogs -- including three that are rarely found on Earth. Scientists have long known that meteorites can contain DNA elements, but were unsure whether these materials actually originate in space. The presence of these three molecules, however, suggest that they do, potentially raising new questions about the dawn of life on Earth, and beyond. It's all quite heady, but steam ahead for a NASA video that might help clarify things, after the break.
Mind controlled motorized wheelchair demonstrated
You know that the future's here when technology arrives that allows vehicles to be controlled with nothing but a thought. Ambient, in partnership with the Rehabilitation Institute of Chicago, has developed a wheelchair that can be instructed to move when the driver thinks about certain words. The key component is a larynx control system called the Audeo, developed by the founders of Ambient, Michael Callahan and Thomas Coleman. The New Scientist has a video demonstration of the unit, which is surprisingly eerie without the usual subtle twitch of a hand that accompanies regular motorized wheelchairs. The next stage in the project -- externally recognizing individual words imagined in the brain -- is apparently a while off: still, we think a thought controlled anything at this stage in the game is a major feat.
