Pieces of slime mould, 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.
Forty-two tons of soil were carried up three flights of stairs to create Bartlett's 2, 500-square-foot "country in the city, " planted with a lawn, an evergreen maze, a grape arbor, an apple orchard and a rose garden.