This puzzle will require you to obtain a series of x-rays to find the solution. One is in the room you will solve the puzzle in, while another is in the kitchen. To wipe away the mold and grime that’s ...

The maker of a popular app that allows people to report fixable problems in San Francisco has been warned about an imminent shutdown. The app, called Solve SF, is linked to the city's official 311 ...

of the past. XMM-Newton observations are backing up the view that this faint glow of X-rays pervading the cosmos comes essentially from many individual but so-far undetected celestial objects and not ...