Ursus Posted May 22, 2011 Report Share Posted May 22, 2011 Mr Chepstow-Lusty has spent years analysing organic deposits in the mud of a small lake, "more of a pond really," called Marcaccocha on the road between the lower-lying jungle and Machu Picchu. His team found a correlation between the first appearance of maize pollen around 700BC - which showed for the first time that the cereal could be grown at high altitudes - and a spike in the number of mites who feed on animal excrement. They concluded that the widespread shift to agriculture was only possible with an extra ingredient: organic fertilisers on a vast scale. In other words, lots of llama droppings. http://www.bbc.co.uk/news/world-latin-america-13439093 Quote Link to comment Share on other sites More sharing options...
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