Researchers monitored electrical signals in fungal mycelial networks over 100 days to understand how fungi coordinate their activities across space. When fungi encountered wood to decompose, they generated a clear, directional electrical signal from the wood toward the rest of the mycelium, acting like a biological command center. Most remarkably, after 60 days, the fungi developed a week-long electrical rhythm at the wood site, the longest oscillation ever recorded in fungi, which may help the fungus remember resource locations and coordinate its decomposition activities.