On the Swedish Island of Visingso, there is a mysterious forest of oak trees; mysterious because oak trees aren’t indigenous to the island and its origin was unknown for more than a century. Then in 1980, the Swedish Navy received a letter from the Forestry Department reporting that their requested ship lumber was ready. The Navy didn’t even know it had ordered any lumber. After a little historical research, it was discovered that in 1829 the Swedish parliament, recognizing that it takes oak trees one hundred and fifty years to mature and anticipating a shortage of lumber at the turn of the 21st century, ordered that twenty thousand oak trees be planted on Visingso and protected for the Navy.