Andrew Adamatzky is the kind of researcher who asks questions his colleagues find embarrassing. He's investigated whether slime molds can solve mazes, whether chemical systems can perform logic operations, and whether living organisms might replace silicon in computers. In 2022, he wired electrodes into four fungal species and recorded their electrical signals. The spikes came in clusters, bursts and pauses, with a statistical structure resembling human language. Up to 50 distinct "words." Not proof of communication, but proof that something consistent and measurable was happening inside a mushroom. That measurability is what counts. Mycelium, the vast underground network beneath every mushroom, detects light, chemicals, pH, CO2, gravity, and damage, transmitting responses electrically across enormous distances. It is a living sensor network that evolution spent half a billion years perfecting. Researchers took that signal and used it to drive robots. Others used fungal tissue to build biodegradable computer memory, switching electrical states nearly 6,000 times per second. We still don't fully understand what these signals mean. But it turns out we don't need to. The signals are real, responsive, and apparently useful enough to control a walking machine.

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