This is a remarkable video about how scientists can use sound to diagnose the health of ecosystems. I highly encourage you to watch it, full screen, with no other windows open to distract you. Listen to what he's saying--it's quite incredible. July 18 was World Listening Day , and lately I have come across a number of sound-related articles , activities , and experiences that have made my ears more attuned to the world around me. Yesterday at camp, we did an activity called Graveyard, which can also be called Sit Spot. Each child and counselor found a space around a pond where they could stay silent and observe. We sat for twenty minutes, using our eyes and ears to become attuned to the pond. Our silence and immobility allowed birds, dragonflies, and frogs to return to the pond as though we weren't there. One camper told me a frog had hopped onto her arm as she sat silently observing its journey around the pond. Dragonflies helicoptered their ways across the water. ...