Eerie Recordings of World's Largest Living Thing Unveiled.

Sound artist Jeff Rice has recorded the sounds of Pando, the world's largest living organism, using a hydrophone placed inside a hollow at the base of a branch and threaded down to the tree's roots. The recordings captured the eerie low rumbling of millions of leaves in the forest, vibrating the tree and passing down through the branches, down into the earth. Pando, a forest made of a single tree with 47,000 stems sprouting from a shared root system over 100 acres of Utah, is deteriorating due to human activities, leaving researchers concerned that Pando's days and all the forest life it supports are numbered.