If you’ve walked through an aspen grove, then you’ve met a clone. Let us explain. The Pando Aspen Clone on the Fishlake National Forest is the world’s largest, most dense organism to ever exist. Weighing in at 13 million pounds, the collective root system of these 40,000 aspen trees is believed to have been born from a single seed at the end of the last ice age (about 2.6 million years ago!) One aspen tree is only a small part of a larger organism. A stand or group of aspen trees is considered a