Numerous aspects of nature allow us to examine our planet's history from a geological and environmental perspective. One example of this is trees. All trees are carriers of the earth's history, and some are even several thousand years old. Looking behind a tree's rough bark, we can examine the earth's history through the ringed patterns. Each ring is unique because its size depends on the climatic conditions of that specific year. For instance, the more water available for a year, the wider a ring would be. By examining trees, scientists can compile vital data to analyze past ecosystems and climate conditions.