National Institute of Allergy and Infectious Diseases Director Dr. Anthony Fauci said a voluntary halt to bird flu research should stay in effect. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

The European hornet, or vespa crabro, helps make wine by kickstarting the fermentation process while the grapes are still on the vine. Otto Hahn/Getty Images/Picture Press RM hide caption

itoggle caption Otto Hahn/Getty Images/Picture Press RM

The NuSTAR telescope, seen in this artist's illustration, will soon be sending back data that researchers will use to study black holes. NASA/JPL-Caltech hide caption

itoggle caption NASA/JPL-Caltech

CamelBak-brand water bottles on display at an outdoor supply store in Arcadia, Calif., in 2008. The company removed BPA from the plastic in its bottles. David McNew/Getty Images hide caption

itoggle caption David McNew/Getty Images

A government official in Bali, Indonesia, holds a chicken before administering an injection to cull it as a precautionary measure in April to prevent the spread of bird flu. Firdia Lisnawati/AP hide caption

itoggle caption Firdia Lisnawati/AP

Timothy Ray Brown, shown in May 2011 with his dog Jack in San Francisco, is the only man ever known to have been fully cured from AIDS. Brown is known as the "Berlin patient" because he had a bone marrow transplant in a German hospital five years ago. Eric Risberg/AP hide caption

itoggle caption Eric Risberg/AP