While this, at first glance, might look like just your average grove of aspens, it’s actually considered a single living organism. Huh? Yes, this grove of approximately 47,000 trees is classified as a clonal colony, each tree consisting of the same genetic makeup and sharing one massive underground root system. Weighing in at 6,000,000 kilograms, it’s considered the heaviest known organism. It’s not just heavy, though – it takes up some serious space, covering 107 acres. Pando, also known as the Trembling Giant, is located in Fishlake National Forest in south-central Utah.