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How seriously the play is taken depends on the people involved, and the scenario may be anywhere from simple and makeshift to detailed and elaborate, complete with costumes and a script.

Dating lake levels

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An analysis of core samples taken from the centre of the Salar de Uyuni shows that there are several layers of salt and layers of lacustrine mud, showing that the plain was successively covered by lakes alternating with dry spells.These lakes were fed by water flowing south via the Desaguadero River from Lake Titicaca in the north and in these periods the precipitation was much greater than today.Various geologic, atmospheric and solar processes can influence atmospheric carbon-14 levels.Since the 1960s, scientists have started accounting for the variations by calibrating the clock against the known ages of tree rings.The clock was initially calibrated by dating objects of known age such as Egyptian mummies and bread from Pompeii; work that won Willard Libby the 1960 Nobel Prize in Chemistry.

"Everything which has come down to us from heathendom is wrapped in a thick fog; it belongs to a space of time we cannot measure.

No such change was indicated by the tree-tilting chronologies, but wave erosion occurred in exceptionally rainy years.

According to the modern record, spring lake-level rise is due to increased snowfalls since the 1930s.

Radiocarbon dating has been one of the most significant discoveries in 20th century science.

Renfrew (1973) called it 'the radiocarbon revolution' in describing its impact upon the human sciences.