European researchers are developing a tool to help identify animal emotions through a vocal recognition system. It aims to help people who work with pigs identify whether the animals are in distress.

Guinea pigs are small animals with big opinions, and squeaks are the fastest way they share them. These sounds typically begin early, often within two weeks of birth, and continue throughout the day.

A PETA truck blaring recorded sounds of pigs traveled to a Springfield restaurant as part of an ongoing campaign urging ...