This was no easy task. "We know how to replace instruments and electrical connectors but we had never attempted to go inside the guts of an instrument and fix it in space," says Michael Weiss, deputy programme manager for Hubble at NASA's Goddard Space Flight Center in Greenbelt, Maryland. Repairing such complex equipment is usually done on a sterile bench inside a laboratory cleaner than an operating theatre, with each step taken painstakingly precisely - not something easily done in a pressurised spacesuit.
It required a completely new set of tools to be built for the job, which had to be easy for the astronauts to use, electrically neutral, and able to prevent the screws and bolts from floating off into space as soon as they were loosened.The study shows there is still more to learn from what is "probably the single most examined rock in all of human history," says Marc Fries of NASA's Jet Propulsion Laboratory in Pasadena, California, who has previously examined samples of the meteorite but was not a member of Niles's team.
But there is still no proof of any past Martian life in the rock, he and Niles agree. Determining whether Mars ever harboured life may require a mission to bring back rock samples from the planet, he says.IMAGINE you are an experienced martial arts referee. You are asked to score a number of taekwondo bouts, shown to you on video. In each bout, one combatant is wearing red, the other blue. Would clothing colour make any difference to your impartial, expert judgement? Of course it wouldn't.
Yet research shows it almost certainly would. Last year, sports psychologists at the University of Münster, Germany, showed video clips of bouts to 42 experienced referees. They then played the same clips again, digitally manipulated so that the clothing colours were swapped round. The result? In close matches, the scoring swapped round too, with red competitors awarded an average of 13 per cent more points than when they were dressed in blue (Psychological Science, vol 19, p 769). "If one competitor is strong and the other weak, it won't change the outcome of the fight," says Norbert Hagemann, who led the study. "But the closer the levels, the easier it is for the colour to tip the scale."
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It required a completely new set of tools to be built for the job, which had to be easy for the astronauts to use, electrically neutral, and able to prevent the screws and bolts from floating off into space as soon as they were loosened.The study shows there is still more to learn from what is "probably the single most examined rock in all of human history," says Marc Fries of NASA's Jet Propulsion Laboratory in Pasadena, California, who has previously examined samples of the meteorite but was not a member of Niles's team.
But there is still no proof of any past Martian life in the rock, he and Niles agree. Determining whether Mars ever harboured life may require a mission to bring back rock samples from the planet, he says.IMAGINE you are an experienced martial arts referee. You are asked to score a number of taekwondo bouts, shown to you on video. In each bout, one combatant is wearing red, the other blue. Would clothing colour make any difference to your impartial, expert judgement? Of course it wouldn't.
Yet research shows it almost certainly would. Last year, sports psychologists at the University of Münster, Germany, showed video clips of bouts to 42 experienced referees. They then played the same clips again, digitally manipulated so that the clothing colours were swapped round. The result? In close matches, the scoring swapped round too, with red competitors awarded an average of 13 per cent more points than when they were dressed in blue (Psychological Science, vol 19, p 769). "If one competitor is strong and the other weak, it won't change the outcome of the fight," says Norbert Hagemann, who led the study. "But the closer the levels, the easier it is for the colour to tip the scale."
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