Add Yahoo as a preferred source to see more of our stories on Google. SpaceX padded the record for its most-flown rocket booster late Saturday with its 33rd trip to space. A Falcon 9 flying 28 ...

Forty years ago today, Americans were stunned, shocked and saddened when the Challenger space shuttle exploded 73 seconds after liftoff on a cold, cloudless day in Florida. A booster leak ignited the ...

Bob Ebeling was anxious and angry as he drove to work on the morning of Jan. 28, 1986. He kept thinking about the space shuttle Challenger, cradled on a Florida launchpad 2,000 miles away. Ebeling ...