In 2010 a group of scientists embarked on a somewhat unusual – but now famous – experiment in which they proved that a brainless organism, called a slime mould, could reproduce the route map of greater Tokyo railway system. It even gave hints on how to improve the design. Understandably, scientists have since been battling over whether simple life forms such as these should be considered intelligent.
Dunce or deliberate? A slime mould can appear to be just a small cell, capable only of feeding and reproducing. But it’s impossible to watch a slime mould – apparently – without sensing some deliberation at play. In another famous experiment, the organism found the shortest route through a maze in search of food.
A mystery: Toshiyuki Nakagaki, a scientist, betrays a sense of wonder while discussing the slime mould’s “intelligence”, a word that biologists invoke carefully. Others have since justified the use of the word, as well as other fraught ones such as “learning” and “memory”, in describing it. Which poses a mystery: how is this cell without even a semblance of a brain, capable of it all – the decision-making, the memory, the processing of information?
How long will it take to read: A slimy 12 and three-quarter minutes.
Further reading: ‘I have an understanding housemate’: the student who makes videos of fungus on faeces.
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