The virus rarely spreads from mother to child before birth, but it can—and researchers are starting to investigate the path it takes.

Researchers use optical illusions to investigate canine perception.

A recent study sheds light on a previously unknown mechanism for fending off the pathogen, and potentially other viruses as well.

Researchers are experimenting with a variety of tools, from brain stimulation to audiovisual equipment, to try to take control of the sleeping brain.

Nutrition researchers are beginning to use metabolomics to determine how healthy subjects’ diets are, and even to reveal specific properties of the foods they eat.

A recent study elucidates some of the changes that occur in the body after inoculation with a tuberculosis vaccine.

In South Africa, the composition of droppings varies by species’ body sizes, and which animals are found where depends on vegetation density.

Knock-on effects of melting sea ice in the Arctic may be to blame for a spate of gray whale deaths along their migration route from Mexico to Alaska.

The release of gray wolves in Yellowstone decades ago still stands as one of the few examples of a predator reintroduction, and the lessons learned continue to be debated. New projects aim to do it again.