If you ask any ornamental fish enthusiast to name the easiest fish to rear, the answer is almost always the humble guppy. For decades, these tiny, vibrant swimmers have been a staple in home aquariums ...

Guppies are a small, pretty species of fish that are extremely popular for home aquariums. While they’re fun in captivity, in the wild they can cause major trouble. Native to South America, guppies ...

Duping a guppy is easier than duping a ring dove — at least when it comes to a classic optical illusion. In the Ebbinghaus illusion, two identical circles placed side by side are each framed by a set ...