Mars Robot May Destroy Life It Was Sent To Find 129
Hugh Pickens writes "New Scientist reports that instead of identifying chemicals that could point to life, NASA's robot explorers may have been toasting them by mistake. Even if Mars never had life, comets and asteroids that have struck the planet should have scattered at least some organic molecules over its surface but landers have failed to detect even minute quantities of organic compounds. Now scientists say they may have stumbled on something in the Martian soil that may have, in effect, been hiding the organics: a class of chemicals called perchlorates. At low temperatures, perchlorates are relatively harmless but when heated to hundreds of degrees Celsius perchlorates release a lot of oxygen, which tends to cause any nearby combustible material to burn. The Phoenix and Viking landers looked for organic molecules by heating soil samples to similarly high temperatures to evaporate them and analyse them in gas form. When Douglas Ming of NASA's Johnson Space Center in Houston, Texas, and colleagues tried heating organics and perchlorates like this on Earth, the resulting combustion left no trace of organics behind. "We haven't looked the right way," says Chris McKay of NASA's Ames Research Center. Jeffrey Bada of the University of California, San Diego, agrees that a new approach is needed. He is leading work on a new instrument called Urey which will be able to detect organic material at concentrations as low as a few parts per trillion. The good news is that, although Urey heats its samples, it does so in water, so the organics cannot burn up."
Re:We can't let them kill the Mars life (Score:3, Informative)
Re:what are we trying to prove then? (Score:1, Informative)
The test doesn't merely return a yes/no, but it lists which organic molecules it found. Some organic compounds don't last very long, so they would indicate life.
Misleading headline (Score:5, Informative)
implies that it destroyed all life on the planet (the "life it was sent to find"). Instead, it sounds like its life detector merely destroys signs of life in the samples it's testing.
Re:What (Score:4, Informative)
Why would we expect comets or asteroids to carry organics? Haven't they been around much longer than life?
Re:2.45 GHz (Score:3, Informative)
Wouldn't you want to use an IR Spectrometer?
I'm actually somewhat surprised that we've never sent one up to Mars, given that you can find one in most research facilities today.
Re:Simple explanation.. (Score:4, Informative)
Robinson Crusoe on Mars... (Score:3, Informative)
Re:Didn't they test this before? (Score:3, Informative)
Before the launched the chemical detectors to Mars, they didn't have a real good idea what chemicals were present in the soil in order to develop the a realistic simulant.