Long but interesting and slightly scary article, recommended by my older sister. I haven’t read it yet, I will this evening.
Scientists are battling over whether supposedly simple organisms should be considered ‘intelligent’. The outcome could reshape our understanding of the natural world – and our own place within it
Forty years ago, as an undergraduate in Hokkaido, Toshiyuki Nakagaki came upon a lemon-yellow stain in a petri dish. That encounter turned him into a doyen of slime mould research – and fed a storm of biological and philosophical debate about the meanings of life and intelligence that persists to this day. Before, no one would have called a slime mould “intelligent”; the popular adjective, in fact, was “simple”. “A simple mass of protoplasm,” one 1895 description ran; “among the most simple of organisms”, said another. And it was hard to argue otherwise. A slime mould can appear to be just a small cell, capable only of feeding and reproducing. Simple is as simple does.
….In 2000, his astonishing research began to surface in the media. “Slime mould solves maze puzzle,” one headline ran, summarising an experiment in which Nakagaki induced a Physarum to find the shortest route through a maze in search of food.