Pando, the world’s largest living organism, may be the oldest living thing, new study reveals

A recent study has revealed new information about Pando, the colossal aspen clone from Utah’s Fishlake National Forest, suggesting that this vast organism may be up to 80,000 years old. The study, led by Utah State University researcher Rozenn Pineau, reveals Pando’s potential age by examining its unique clonal growth pattern and genetic mutations, indicating that the organism could be developed since the first human migrations out of Africa. The research, currently published on bioRxiv for peer review, studies the mutation rate of Pando’s genome, with estimates ranging from 16,000 to 80,000 years ago.

The largest living organism in the world

Pando, meaning “I propagate” in Latin, holds the title of the world’s largest organism, covering more than 100 acres and comprising approximately 47,000 stems. This massive clonal colony arises from a unique root system that connects each stem, making Pando not only large in area, but also the heaviest living organism in the world. According to According to Paul Rogers, director of the Western Aspen Alliance, the genetic continuity of the aspen’s root system allows it to withstand environmental changes. Rogers noted that no previous studies have confirmed Pando’s age, making this study an important step in understanding the organism’s ancient origins.

Genetic discoveries and environmental challenges

Pineau’s research highlights that the spread of the Pando mutation is less than expected, with neighboring stems showing limited genetic diversity despite spatial proximity. This suggests a surprising level of genetic stability in Pando, even over thousands of years. Analyzing pollen from a nearby lake bed, the researchers noted that aspen pollen had been appearing regularly in the sediment for more than 60,000 years, potentially confirming Pando’s ancient presence in the area.

To combat threats from deer and livestock grazing, conservation measures have been implemented, with fenced sections now protecting parts of the grove. Rogers observed encouraging signs of regeneration during a recent visit, suggesting that fencing and favorable rainfall could help Pando’s recovery.