The builders dug up on the island Siland the skull of a very strange shape that does not match the man's head. All in excessively large eye sockets, which presumably was located the eye.
However, the skull was a giant size. It exceeds the size of the skull of an adult modern man by about half. The discovery, according to preliminary statements of experts, not less than 800 years.
There are several theories of the origin of the skull. The first skull belongs to one of the prehistoric animals. However, this assumption has rejected. The second theory involves changes in the bone structure from some disease. Recent theory suggests an extraterrestrial origin of the skull.