Image of the Day

Dozens of researchers, including myself, worked for years to uncover that swine flu had leapt to humans from a pig in Mexico in 2009. We learned a lot about influenza evolution, pig farming, and outbreak risk along the way.

An analysis of microwear patterns in fossilized canid teeth supports the theory that early dogs and wolves had distinct diets.

Patients in a small trial said their chronic pain improved an average of 90 percent over the course of 15 days, but returned shortly after the electrical stimulation sessions ended.

Male lemurs secrete aldehydes from their wrist glands that may make them more attractive to females during the breeding season.

Most small amphibious mammals have a diminished sense of smell, a quality that likely arose because of a tradeoff with thermoregulation capacities that allowed them to conserve heat in aquatic environments.

The films coating buckeye butterflies’ wing scales vary in thickness, creating a broad spectrum of iridescent colors.  

Super-resolution imaging identifies abnormalities in the hair-like protrusions on a cell’s surface and may help facilitate earlier detection of primary ciliary dyskinesia.

A new study finds that the extinct European cave bear’s large sinuses represent a tradeoff between hibernation length and the flexibility of their diets.