Macaques living near the Rock of Gibraltar eat a lot of tourists' food. A new study suggests the monkeys have learned to eat dirt to settle their stomachs.

This video presents a peaceful moment as a monkey enjoys a variety of fresh and healthy fruits. The natural setting and simple behavior highlight how animals instinctively choose nutritious foods.

We've all been there. You eat a Big Mac or an ice cream cone, and your stomach disagrees with some of the choices you've made. The same can be true for animals. A new study finds one group of junk ...