Studying micro-organisms usually requires a petri dish, but a group of researchers in Norway decided to make things a little more exciting, in a three dimensional throwback to the 1980s. The team recreated the maze from the Japanese arcade classic Pac-Man, on a tiny scale, and set two kinds of microorganisms loose. They then monitored the creatures' behaviour, to learn more about the dynamics between predator and prey microorganisms. The researchers recreated the legendary labyrinth from the game Pac-Man (shown left) on a tiny scale less than 0.04 inches (one millimetre) in diameter, shown right The three dimensional labyrinth was filled with microscopic prey and predators swimming around in a fluid filled with nutrients. Single celled organisms, the prey, along with multi-cellular'rotifers', the predators, were released into the nutrient-laden fluid maze.