Studying wolves' howls could reveal how human language evolved.

These plantations are not only eating into the land occupied by the region's native forests, they could also disturb the ground water reserve and soil quality

A lot of AIDS vaccine research is going on, but it is hard to say when it will be available, says Mark Feinberg, president and CEO of the International AIDS Vaccine Initiative.

What does a man who feels like a woman face when married? And how does his wife cope?