The findings from a toddler’s severe infection with Shiga-toxin E. coli could help identify genetic markers and potential vaccines for the increasingly common pathogen.

The remains of Bronze Age warriors suggest lactose tolerance, or the ability to digest milk, spread rapidly throughout Central Europe.

Variation in a group of genes called a "supergene" explains why two kinds of white-throated sparrows have different levels of aggression, researchers say.

New evidence suggests that the way brains work across the animal kingdom goes back to a common source, researchers report.

The genomes of six living bat species reveals the source of some of their superpowers, including echolocation, flight, and imperviousness to certain deadly viruses.

New research clarifies the throat and belly colors of hybrid warblers. It's plumage that ornithologists have puzzled over for a long time.

All the adult Asian longhorned ticks found in the United States so far have been female. Here's why.

A drug that blocks a tumor-producing protein could help make immunotherapy for cancer more effective, researchers find.

There may be a connection between genes involved in the opioid system and feelings of insecurity in romantic relationships, researchers find.

DNA from a 9,500-year-old dog from the Siberian island of Zhokhov provides a new picture of sled dogs today, including huskies and malamutes.