Science and technology

Associated Press
In this image made from video provided by NASA, astronauts Chris Cassidy, foreground, and Tom Marshburn prepare for a possible spacewalk from the International Space Station on Friday, May 10, 2013. NASA will decide later Friday if the two astronauts will step outside the station to work on a leaking coolant line. The line chills power systems but power was rerouted and is operating normally. The six-member crew is not in danger. (AP Photo/NASA)

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