18-to-29-year-olds use Twitter the most, Pew study shows
Company expands Google +1 after former CEO Schmidt admits to missing the boat on social Web, Facebook threat
Space shuttle Endeavour successfully completes final mission, heads to retirement
Moving <i>Endeavour's</i> robotic arm to station, NASA team finishes work on U.S. segment of orbiter
Spacewalkers give Canadarm II new footing and will leave shuttle arm at station
After Gaga fans overwhelmed Amazon on Monday, site offers 99-cent album again
Robotic arm will collect an asteroid sample as spacecraft hovers close to asteroid
Twitter scoops up popular third-party apps for its social network platform
There's been no communication with the rover in more than a year
Space agency bases new spacecraft on designs for planned moon craft
