• U.S. doctors begin first human trial of embryonic stem cells on paralyzed patient in Atlanta
  • Nissan reaches 20,000-order goal for its all-electric car ahead of schedule, despite the Leaf's limited (100-mile) range
  • Scientists think they have solved the disappearing-bees puzzle: a fungus and virus combination that is treatable
  • Obama to install solar panels on White House roof, prompting unflattering comparisons to Carter
  • Accident at factory in Hungary sends millions of gallons of toxic red sludge through villages and into the Danube
  • U.S. apologizes for intentionally infecting Guatemalans with venereal diseases in the 1940s during penicillin testing