A few months ago I watched a show on the History Channel or on PBS where archaeologists had discovered a well-preserved body of a Celt somewhere in Ireland or Scotland. They theorized that the person had actually been tortured and killed (they found evidence of this on his body) and then staked into the bottom of what was a marsh many hundreds (maybe over a thousand) years ago. The chemical makeup of the bog/marsh actually preserved the body quite well, almost in mummification-like form. Eventually I believe that the bog/marsh became peat, which is a kind of earth that is traditionally used as a burning fuel.
I saw a rebroadcast of this show on NOVA on PBS. It was really quite fascinating. At least one of the bodies they studied dated to the Iron Age and based on forensics they were able to determine that the person lived an upper-class lifestyle (well fed, no manual labor) and was strangely tortured and killed and pinned to the bottom of the bog. The mystery was why this all happened, and one theory held that it was done as a way of "appeasing" the gods by having one of the society's "fortunate sons" to be sacrificed.
Did anyone else catch this episode?