One of the World’s Oldest, Largest Living Organisms Is a Grove of Quaking Aspens

IN THE FISHLAKE NATIONAL FOREST in Utah, a giant has lived quietly for the past 80,000 years.

The Trembling Giant, or Pando, is an enormous grove of quaking aspens that take the “forest as a single organism” metaphor and makes it literal: the grove really is a single organism. Each of the approximately 47,000 or so trees in the grove is genetically identical and all the trees share a single root system. While many trees spread through flowering and sexual reproduction, quaking aspens usually reproduce asexually, by sprouting new trees from the expansive lateral root of the parent. The individual trees aren’t individuals but stems of a massive single clone, and this clone is truly massive. “Pando” is a Latin word that translates to “I spread.”

Spanning 107 acres and weighing 6,615 tons, Pando was once thought to be the world’s largest organism (now usurped by thousand-acre fungal mats in Oregon), and is almost certainly the most massive. In terms of other superlatives, the more optimistic estimates of Pando’s age have it as over one million years old, which would easily make it one of the world’s oldest living organisms. Some of the trees in the forest are over 130 years old.

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