Up until quite recently, the animal phylum Placozoa enjoyed a unique position in animal systematics. It was the only phylum to which only a single species had ever been assigned: Trichoplax adhaerens.

Classification is a natural human propensity—we organize our clothes, our kitchen cupboards, and our toys. This applies to the natural world, too, where animals and plants are grouped based on ...

Free listing was used to obtain names of marine animals from 234 Peruvian children with families involved in fishing activities. They live in the fishing towns of Vila-vila, Morro Sama and Ilo, ...