"The Boole Tree," the sixth-largest living sequoia, was the only mature tree left standing by loggers in the Converse Basin Grove in the late 1800s—spared due to its size. A historic photo from the 1890s shows dozens of loggers gathered at its base, their names, hometowns, and dates carved into the trunk. Though long healed and nearly invisible to the naked eye, these inscriptions reappear more than 130 years later when viewed through a thermal camera, where the scar tissue emits less heat than the surrounding bark