Pando Aspen Grove

At 106 acres, Pando is the largest known aspen clone, and the most massive living thing known on earth. It's trees are united by a single root system. Scientists say deer are voraciously eating Pando's new sprouts, preventing the clone from regenerating. It could deteriorate beyond recovery in less than 20 years, scientists say.

Source: Paul C. Rogers, Western Aspen Alliance, Utah State University