H5N1 avian flu viruses (seen in gold) grow inside canine kidney cells (seen in green).
Scientists and security specialists are in the midst of a fierce debate over recent experiments on a strain of bird flu virus that made it more contagious.
The big question: Should the results be made public? Critics say doing so could potentially reveal how...
Concertgoers move in a spray of cooling mist as they dance amid the heat of the desert at the hipster Coachella Valley Music & Arts Festival in Indio, Calif., in April....
