A Pentagon-sponsored robot race at a former Air Force base revealed that computer-controlled vehicles, at least to date, have failings that are all too human.

  Dr. Orgel?s studies of early life on primitive Earth helped lead to the formation of a now widely accepted theory about the development of DNA.

  The repair to a solar array on the International Space Station was very delicate because of mechanical issues.

  A summit convened by the U.S. Conference of Mayors presented two main themes: the federal government must do more to fight global warming; and in the meantime, cities must take up the slack.

  Texas is collecting bids from private buyers for a 9,270-acre tract of wildlife preserve, setting off a conservationist uproar.

  In the procedure an astronaut will be out on the end of a 50-foot-long boom gripped by the space station?s robotic arm, either unsnagging or cutting a wire.

  Seven years into an $8 billion effort to rescue the Florida Everglades, federal financing has slowed to a trickle.

  The American Museum of Natural History?s show is enlightening, yet frustrating: It presents a free-flowing flood of data and has an overly insistent and predictable message.

  Mission managers at NASA have put off a spacewalk in order to focus on repairing a torn solar panel on the International Space Station.

  NASA has previously said that the data, which comes from tens of thousands of interviews with pilots about safety issues, could damage the airline industry.

  Washoe captured the world?s attention and set off a debate over nonhuman primates?ability to learn human language that continues to this day.

  Tuesday night?s 5.6 magnitude quake near San Francisco set off worries among scientists that the tremor could be a precursor of worse to come.

  The first headquarters of the nation?s secret effort to build the bomb lay in New York City.

  New research suggests that in mice, a simple treatment that does not involve drugs appears to be directing cells to turn into bone instead of fat.