Russian surgeons said what they first believed was a tumor in a man's lungs turned out to be a living, growing fir tree, according to reports in the Russian media. The doctors said they found a tree measuring nearly 2 inches long inside the lung tissues of 28-year-old Artyom Sidorkin. Horticulturalists remain skeptical, however. Tricia Diggins of the Wellesley College Botanical Gardens in Boston told ABCNews.com that while it may be possible for such trees to grow without light, she doubted whether such an environment could yield an apparently normal, green plant. (ABC )