What is the world's oldest known tree species?

The world's oldest known tree species is the Bristlecone Pine, also known as Pinus longaeva. This species is found in the western United States, primarily in California, Nevada, and Utah. Bristlecone pines are remarkable for their longevity, with some individuals living for more than 5,000 years. The oldest known Bristlecone Pine is called Methuselah, which is located in the White Mountains of eastern California and is estimated to be over 4,800 years old.

Scientists have studied Bristlecone Pines extensively to learn about their growth patterns and what allows them to live for so long. They have found that the trees' slow growth, resistance to disease, and ability to withstand harsh weather conditions are some of the key factors that contribute to their longevity.

Bristlecone Pines are a treasured part of the natural landscape, and efforts are being made to protect and preserve these ancient trees for future generations to enjoy.