Gorillas in southern Cameroon appear to be the source for the second-most-lethal category of the HIV virus that infects humans.
We asked experts to explain how the vaccine works and why the outbreak is happening now.
A baby created with DNA from three people could be born as soon as this year.
A husband and wife are sick with avian flu after returning from China.
Flatulence, diarrhea, rashes and other health issues have been with some humans and their ancestors for up to a million or more years.
The map reveals exactly which proteins are special to organs, and which ones are common across all tissues in the body.
Scientists have discovered a new class of antibiotics that can kill a wide range of dangerous, drug-resistant bacteria.
Insect-eating bats that inhabited a hollow tree in a remote village in Guinea may have been the source of the world's biggest Ebola epidemic.
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