Science and technology

Associated Press
In this Saturday, May 11, 2013 photo made available by NASA, astronaut Chris Cassidy and Tom Marshburn, not pictured, perform a space walk to inspect and replace a pump controller box on the International Space Station after an ammonia coolant leak was discovered. (AP Photo/NASA)

View gallery

500 photos

Astronomy, meteorology, environment, archaeology, electronics, computers and gadgets

View Comments (0)