The “Trembling Giant” also known as Pando is a colony of over 40,000 quaking aspen trees in Fishlake National Forest in Utah which are thought to be about 80,000 years old. Not only is it the worlds oldest forest but Pando is also the worlds largest living single organism due to the fact that it is a clonal colony; a group of trees which are genetically identical and are connected to each other using a single root system.
The Fulufjallet Mountains in Sweden contain the worlds oldest single living clonal tree. Named Old Tjikko it’s dated to be 9,550 years old.
The worlds oldest dated single tree is a bristlecone pine tree in the White Mountains, California, USA. It’s been dated to be 5,062 years old, taking the title from Methuselah, another bristlecone also in the White Mountains who is dated at 4,847 years old.
To read more about Pando you can visit Pando- The Trembling Giant, or to read about the worlds oldest trees visit Live Science- What is the oldest tree in the World?