Something has been lurking in empty space, and for the first time, physicists may have caught it leaving fingerprints. Quantum theory has long predicted that the vacuum seethes with virtual particles, ...

Companies must sometimes team up with governments, NGOs, and even rivals to capture the economic benefits of social progress. by Mark R. Kramer and Marc W. Pfitzer In the past, companies rarely ...

The families of eight school shooting victims opened their doors to Steve Hartman and photographer Lou Bopp, allowing them to document their children's bedrooms, just as they left them. Each room ...