ElonMusk

America's Wealthy Step Up to the Plate

This month, 12 more billionaire families committed to donate at least half of their wealth to charity by taking the Giving Pledge. Here are introductions to some of the new signatories and their pet philanthropic projects.

Red Star Rising: Is U.S. Losing the Space Race?

On Sept. 29, 2011, the first module of a new space station blasted into orbit, initiating an era of space exploration different in one key respect: We didn't launch this station; China did. And while China's ascendance to space superpower confirms changes in the global economy, you shouldn't count the U.S. out of space just yet.