A new space race? China adds urgency to US return to moon

It's not just rocket fuel propelling America's first moonshot after a half-century lull. Strategic rivalry with China's ambitious space program is helping drive NASA's effort to get back into space in a bigger way, as both ...

NASA readies for Saturday Moon rocket launch attempt

The stars appear to be aligned for NASA's Moon rocket to finally blast off on Saturday, with weather forecasts favorable and technical issues that postponed the launch earlier this week resolved.

Mathematics for safer medicine

Natural sciences continuously produce larger and more complex data sets – using elaborate sensor technology or computer simulations. But can researchers be sure that the results of their computer simulations are reliable ...

World timekeepers wrangle over scrapping leap second

Timekeeping experts failed Friday to reach a decision on scrapping the four-decade-old practice of adding extra seconds to clocks, a system opponents say causes headaches in a hi-tech, interconnected world.

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