Our Lecturer was explaining ethnographic writing, and a study undertaken on warning future Anthropologists, who may have uncovered a mysterious archaeological site (which happened to be one of our longterm nuclear storage locations, and entering posed a danger to their immediate health). :)

The study looked at finding a universal sign or signal for danger, which could basically be posed on the door of places like Yucca Mountain (http://en.wikipedia.org/wiki/Yucca_Mountain ). The symbol needed to be relatively static over time and uniform across as many cultures as possible. Not too surprisingly, they were unable to find anything suitable. The safest solution was to employ a 'gate-keeper' of this knowledge. It is the gate-keepers responsibility to pass on the significance of exactly what this 'stuff' buried here is. Or just mark them all on Google Maps. :)

I hope this makes sense, it's getting a bit late here!

hads.