Analysts say Russia?s pipeline deal with Kazakhstan and Turkmenistan could strengthen its monopoly on Central Asia?s energy exports.

  E.U. countries scaled back a proposal to regulate airline emissions, but agreed on measures likely to intensify a battle with the United States over environmental regulation.

  A debate over a hypothesis that cancers are fed by cancerous stem cells could affect the path of research.

  Giving credence to the long-held belief that orphanages stunt children?s mental development, a study shows that infants placed with foster families have higher IQs on average than those who remain in institutions.

  Japan is dropping its plan to kill humpback whales in the seas off Antarctica, the country?s top government spokesman said.

  Green show houses are appearing across the country, spreading a message about environmentally conscious building.

  The E.P.A. said the proposed California rules were made moot by the energy bill signed into law by President Bush on Wednesday.

  E.U. officials told leading automakers to make deep cuts in emissions or face fines that could reach billions of euros. But automakers promised a fight.

  Walter H. G. Lewin, a physics professor at M.I.T., has found devotees across the country with his online lectures.

  Astronauts and engineers spent Tuesday troubleshooting problems in space and on the ground.

  Alan Rabinowitz has persuaded dictatorships and democracies alike to protect their felines.

  ?Trumpery,?a play that opened this month in New York, explores a period teeming with religiosity and controversy.

  Scientists have found evidence of a peril that human ancestors encountered in their migrations out of Africa: tuberculosis.

  More than winter blahs, seasonal depression is recognized and treatable.