The Oldest Known Living Organism Is Over 80,000 Years Old

What appears to be a sprawling 106-acre forest of individual quaking aspen trees in Utah is, in fact, a single living being. Named Pando, which is Latin for "I spread," this organism is a clonal colony. All of its 40,000-plus stems are genetically identical and spring from a single, massive underground root system. This unique biology is the key to its incredible longevity and scale. While any individual tree trunk lives for about 130 years, the root system endures, constantly sending up new clones to replace the old ones.

The mind-boggling age estimate of 80,000 years is based on the colony's current size and the established growth rate of aspens. This means Pando’s root network (Review) has been alive and spreading since the last ice age, surviving countless shifts in climate, fires, and geological changes. This continuous cycle of death and regeneration makes it a living fossil and a true natural wonder. Unfortunately, despite its ancient resilience, scientists have noted that Pando is in decline, as overgrazing by deer and cattle is preventing new stems from reaching maturity, threatening the future of this colossal titan.