Researchers placed test chambers with a single entrance near a forest outside Warsaw, where they observed the social interactions between wild black-striped and yellow-necked mice. Over seven ...

One has brown fur and will grow up to be lean and healthy; the other has yellow fur and is destined to be obese and prone to disease. How can two mice sharing exactly the same DNA become so different?

Street dogs in India appear to have a preference for the color yellow, disproportionately choosing bowls in a sunny hue over those that are blue or gray, even when the other bowls contain a snack.