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The Llangernyw yew, spreading it's branches over a graveyard in Wales, saw Britain's Bronze Age. The Bristlecone pine known as Methuselah, in Califonia's Inyo Forest, is even older at 4,765 years, possibly the world's oldest individual tree.
The Pando aspen colony in Utah makes them look like springs, however . Considered a single living organism, because its genetically identical stems spring from a single root system, the aspen colony is at least 80,000 years old. By some estimates, it may be as much as one million years old.
How do trees defy the aging process that all life should be heir to? According to scientists, they have advantages the human body lacks. Their genes don't seem to mutate or become damaged over timer, they retain stem cell-like cells with each growth cycle; their vascular system allow a portion of the tree to survive if another part dies; they can replace damaged organs; and some can form clones, as in the case of the Pando
Aspens. Why can't researchers be definite about the Pando Aspens colony's age? Lacking tree rings, observers make estimates based upon what they know of aspen growth rates. Other, older aspens colonies may yet be found in western United States. Scientists are also learning to regenerate ancient plants- in 2012, a Russian team reported that it had grown a delicate Siberian Flower from 32,000 years-old seeds.
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