Scientists have found a group of brain cells that influence body mass in two ways, by controlling how much we eat as well as how much energy we burn. The findings could lead to new drugs to help people shed weight.

Animals learn the hard way which sights, sounds, and smells are relevant to survival. New research in flies shows that the timing of these cues plays an important role in how mental associations arise, and elucidates brain pathways involved in this process.

A tool that detects glitches in gene expression could help doctors tailor treatments for lupus-related kidney damage.

Scientists made the surprising discovery that the insects’ displeasure for touching DEET, the active ingredient in many repellents, helps prevent bites.

To fight off invading viruses, bacteria have evolved a slew of creative defense tactics. New research shows that in some cases, microbes go to great lengths to keep an infection from spreading, even destroying bits of their own genetic material.

In autoimmune disorders, the body’s defense system erroneously attacks normal cells, leading to serious health problems. Researchers have developed new molecules that potentially could be used to treat many of these conditions.

New findings provide insights about how the intestine maximizes nutrient uptake, while at the same time protecting the body from potentially dangerous microbes.

Scientists have discovered a curious phenomenon taking place in mouse skin: cells compete with one another for the chance to develop into mature tissue. The findings indicate that this antagonism is key to creating healthy skin.

Rockefeller scientists have identified a genetic condition that makes people prone to developing tuberculosis. In a British population, they found that the condition underlies one percent of cases of the disease—a finding that may ultimately lead to new treatment options.

Scientists have found that small genetic differences can cause the same gut microbe to behave differently in different people, and affect the overall health of their human hosts.