An article published in the journal “Current Biology” reports the discovery of an organism dating back to about a billion years ago that lived in present-day Scotland and showed a cell differentiation typical of multicellular organisms. A team of researchers discovered microfossils in the Diagbaig Formation and named this species Bicellum brasieri. The examination led to the conclusion that it could be an organism of the Holozoa group, which includes animals and their closest single-celled relatives. If confirmed, this is the discovery of the oldest known multicellular organism, perhaps even the oldest that ever existed, and could be a new link in the evolutionary history that led to the emergence of animals.