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DENTON, Mont. -- An animal previously believed to be a wolf-dog hybrid is actually just a wolf, a DNA test revealed. "The lab compared the animal's DNA with thousands of other DNA samples from wolves, ...

Authorities say the 60-year-old victim's death has been ruled an "animal mauling," believed to be by a juvenile bear.

When scientists want to trace how a species has changed over time—and predict its prospects for survival—they turn to DNA.

A new study in fruit flies describes how an animal's gut reacts differently to beneficial microbes versus harmful pathogens.