Bristlecone pine research focuses on the study of the oldest living trees on earth, the bristlecone pine species. These trees are known for their exceptional longevity, with some individuals living for thousands of years. Researchers study these trees to gain insights into climate change, tree growth patterns, and environmental history. Bristlecone pines are found in the western United States, particularly in high-elevation regions such as the White Mountains in California and Nevada. Studies of bristlecone pines have provided valuable information about past climate conditions and have contributed to our understanding of long-term environmental trends.