Sound artist eavesdrops on what is thought to be world’s heaviest organism

Artist records underground sounds generated by Pando, a huge group of aspens in Utah considered to be a single organism

When it comes to the world's heaviest living organism, it is a forest of one tree" that is thought to take the crown. Now a sound expert is listening into the quiet grove in an attempt to hear its secrets.

Known as Pando - Latin for I spread" - the 47,000 genetically identical quivering aspens in south-central Utah are considered to be a single organism, with the trees" actually branches thought to be connected by a shared root system.