The discovery suggested problems for the orbiting space station that could affect ambitious plans to add two power-hungry laboratories.

  Environmentalists cheered when a conservancy acquired 161,000 acres, but not all the land will be preserved.

  As the climate warms, Greenlandic farmers are experimenting with vegetables that have previously never been grown in the country.

  The Indonesian government spent much of the past week recruiting countries to join it in pressing richer nations to provide incentives to reduce carbon emissions.

  Iconoclasts at heart, the best scientists are faced with an occupational hazard: having left their mark on one small patch of ground, they are tempted to stir up trouble elsewhere.

  Dr. Kornberg?s Nobel Prize-winning discovery of how DNA is assembled helped ignite the biotechnology revolution.

  The 16-ton new module will serve as a connection point for two new laboratories for the station.

  A third of the 394 known species of apes, monkeys, lemurs and other groups are listed as threatened with extinction in a new report from the World Conservation Union.

  Richard Thompson, who began powering his home with solar power in 2001, has found that power is the easy part. Generating interest takes work.

  The biologist had ignited an uproar with comments about the intelligence of people of African descent.

  The human population is living far beyond its means and inflicting damage to the environment that could pass points of no return, according to a major report from the U.N.

  The director of the Centers for Disease Control and Prevention said the changes were part of a normal review process and not aimed at minimizing the impact of global warming.

  China launched its first lunar probe on Wednesday as the Communist Party moved a step closer to fulfilling its ambitions of one day reaching the moon.

  Alarmed that a 52-year-old paper was stoking the arguments of creationists, a chemistry professor has retracted a paper on the origins of life.