In 1969, Dr. Denton A. Cooley took an artificial heart from the lab of Dr. Michael E. DeBakey and started a feud that ended up on the cover of Life magazine. Now they?ve made up.

  What is the evolutionary value of art and why do we humans spend so much time at it?

  A new source for cells now leads to the question of how to make them useful to the body.

  Ralph Holloway is widely regarded as a leading expert on the evolution of the human brain, even by many who have disagreed with his more controversial conclusions.

  Jessica Snyder Sachs?s capable overview of the global war on germs could hardly be more timely even if it did not call to mind a variety of other recent headlines.

  Sometimes the will to help is what matters, even if the remedy isn?t perfect.

  Scientists are hoping to create more forests in California and other parts of the world.

  Piping plovers are fighting their way off the endangered species list, thanks to a difficult, and sometimes contentious, program to restore them.

  A man with a deep voice may have a survival advantage, a better chance of passing on his genes, a new study suggests.

  The European agriculture commissioner warned farm ministers on Monday that Europe?s resistance to importing genetically modified products could pose a threat to the meat industry.

  The Urban Divers Estuary Conservancy works at transforming New York City waterways from environments that are shunned to those that are protected and perhaps even loved.

  The controversial process of turning sewage into drinking water is getting a close look in several American cities.

  As aged farmers and gardeners in Europe die, there is a chance that the fruits, grains and vegetables they have tended to will be lost within a generation.

  For decades, doctors have dismissed growing pains as normal signs of growing in small children.