Scientists have long suspected that big brains come with an evolutionary price — but now they've published the first experimental evidence to support that suspicion, based on their efforts to breed ...

Set up a new guppy breeding tank with us and enjoy a peaceful nighttime feeding session as these vibrant little fish settle into their new home. From tank prep to baby guppy care, this relaxing video ...

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 ...