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

  A hug today commemorated the first meeting of a female commander of the space shuttle and the International Space Station.

  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.

  Exploring the family tree in search of roots (or royal family connections).

  Those often furious, sometimes deadly Santa Ana winds contributing to the Southern California wildfires are a phenomenon of geography as well as meteorology.

  Despite weather concerns and a small chunk of ice that threatened to delay the beginning of the shuttle Discovery?s mission, everything seemed to fall into place.

  A House committee said it would hold hearings into why the agency is withholding 24,000 responses to a government-sponsored safety survey.

  Poor sleep among the elderly, it turns out, is not because of aging itself, but mostly because of illnesses or the medications used to treat them.

  The homeland security secretary waived several environmental laws to continue building a border fencethrough a national conservation area in Arizona.

  Many people who take sleep medications think they work far better than laboratory measurements show they do.

  Bird sleep is so mysterious that scientists are considering several answers, all intriguing.

  Even toddlers don?t get enough rest, but the real agony starts in the teens.