Pieces of slimemould, an amoeba-like organism, were enticed through a 30-square-centimetre (five-square-inch) maze by the prospect of food at the end of the puzzle.
Toshiyuki Nakagaki of the Bio-Mimetic Control Research Centre, Nagoya, Japan, placed pieces of the slimemould Physarum polycephalum in an agar gel maze comprising four possible routes.