A planned U.S.-funded study of a hepatitis B vaccine drew widespread condemnation from researchers. Now the host country says it cannot proceed.

Saturday marked a momentous occasion at Disney’s Animal Kingdom in Florida, where officials announced an African elephant calf was born at the park for the first time in seven years. The baby girl ...

FILE - This 1981 electron microscope image made available by the U.S. Centers for Disease Control and Prevention shows hepatitis B virus particles, indicated in orange. (Dr. Erskine Palmer/CDC via AP, ...

Two tiny newcomers at the Adventure Aquarium in New Jersey are already stealing hearts and marking a major conservation milestone. Over the weekend, the aquarium announced that they welcomed two baby ...