In one experiment, Boddy allowed a wood-rotting fungus to grow within a block of wood. She then placed the block on a dish. Mycelium spread radially outwards from the block in all directions, forming a fuzzy white circle. Eventually the growing network encountered a new block of wood. Only a small part of the fungus touched the wood, but the behaviour of the entire network changed. The mycelium stopped exploring in all directions. It withdrew the exploratory parts of its network, and thickened the connection with the newly discovered block. After a few days, the network was unrecognisable. It
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