The cut stump of the Prometheus tree. Photo: wikipedia. Prometheus was the oldest tree in the world, and also the oldest known non-clonal organism – which was at least 4862 years old and possibly more than 5000. It was a Great Basin bristlecone pine (Pinus longaeva) tree growing near the tree line on Wheeler Peak in eastern Nevada, United States. The tree was cut down in 1964 by a graduate student and United States Forest Service personnel for research purposes. The people involved did not know of its world-record age before the cutting, but the circumstances and decision-making process remain controversial; not all the facts are agreed upon by all involved.