Researchers developed a new method to detect and measure electrical signals produced by fungal mycelium using specialized circuit boards and advanced analysis techniques. The study found that fungi generate electrical activity that correlates with their growth, which can be altered by treating them with different chemicals. This discovery suggests that fungi may use electrical signals to communicate and adapt to their environment, similar to how animals and plants use electrical signaling. The new method provides a foundation for better understanding how fungi communicate within their networked mycelial systems.