The following pictures of trees, about 5,000 years old. It is reported that the Great Basin bristlecone pine (Great Basin Bristlecone Pines) is considered the world's oldest tree species. This ancient trees grown in California Inyo National Forest Park Wright Peak, they slowly adapted to alkaline soils white here and make this place become their unique habitat. High mountains are stationed in their place, where people can see the eastern part of California's oldest trees, while in Nevada and Utah also have their presence. And for the study of these trees, researchers intercept a short cross-section of the tree to determine the age and growth pattern of trees, and found to bark can also display the changing climate.