Opportunity just started moving again two weeks ago, after spending more than four months at a site along Endeavour's rim called Greeley Haven. The rover sat out the harsh Martian winter at the site, whose tilt allowed Opportunity to angle its solar panels toward the low-hanging sun.
The US will see nine to 15 tropical storms and four to eight of those will become hurricanes, says NOAA in its 2012 Atlantic hurricane forecast. It's a 'near normal' year. Only one to three will likely become major, Category 3, hurricanes.
SpaceX's first attempt to send its Dragon cargo capsule to the International Space Station ended abruptly Saturday morning when computers aboard the company's Falcon 9 rocket shut off the craft's engines just after ignition.
During the past 10 years, Presidents George W. Bush and Obama have directed NASA to turn the job of transporting cargo and crew to the space station over to the private sector. As that process gathers pace, here is a list of the key players.