The role for which a dog was bred—say retrieving birds—is reflected in their brain structure, according to a study of 33 breeds.

Humans have been living alongside animals for thousands of years, turning wolves into loyal dogs and wild cattle into dairy cows. We’ve managed to domesticate horses, chickens, pigs, and ...

Pets and livestock have long been selected based on traits such as friendliness, diet, and ease of management. But not every animal that could be useful ever got the spotlight. In the Americas, a ...