“Messages hum from out of the bark she leans against. Chemical semaphores home in over the air. Currents rise from the soil-gripping roots, relayed over great distances through fungal synapses linked up in a network the size of the planet.” Richard Powers, The Overstory
This could be a doorway to the secret underground network:
Before yoga class at the senior center, I’m just looking for tree shade to park under. After yoga class, I am more aware of the trees themselves. They call to me with an energy stronger than the noise of highway traffic. Their energy is always there, of course. When we pay close attention, we feel the trees hum and allow ourselves to be entranced.