Astronauts hit snag with new space station room

(AP) -- Astronauts ran into trouble Saturday while setting up the International Space Station's newest room, Tranquility: A critical insulating cover does not fit.

Discovery could lead to more difficult Sudoku puzzles

(PhysOrg.com) -- A new analysis of number randomness in Sudoku matrices could lead to the development of more difficult and multi-dimensional Sudoku puzzles. In a recent study, mathematicians have found that the way that ...

Astronauts enter space station's newest room

(AP) -- Astronauts swung open the door to the International Space Station's newest room Friday night, using flashlights to illuminate the shadowy chamber and wearing goggles and masks to keep themselves safe from any floating ...