The 5,000-Year-Old Tree That Knows Earth’s Secrets Alerce trees, also known as Patagonian cypress, are among the oldest living non-clonal trees on Earth. In this episode of Guess What I Found Out, we explore how scientists use tree rings and dendrochronology to uncover thousands of years of climate history, why these ancient trees matter more than modern satellites, and how one tree nicknamed “Great-Grandfather” may be over 5,500 years old. Discover how tree cores work, why scientists are debati