The Inca City of Machu Picchu was built during the 400-year warm spell,scientists say. (Paolo Aguilar/EPA)
From Times Online:
Supreme military organisation and a flair for agricultural invention are traditionally credited for the rise of the Incas. However, their success may have owed more to a spell of good weather — a spell that lasted for more than 400 years.
According to new research, an increase in temperature of several degrees between AD1100 and 1533 allowed vast areas of mountain land to be used for agriculture for the first time. This fuelled the territorial expansion of the Incas, which at its peak stretched from the modern Colombian border to the middle of Chile.
“Yes, they were highly organised, and they had a sophisticated hierarchical system, but it wouldn’t have counted a jot without being underpinned by the warming of the climate,” says Dr Alex Chepstow-Lusty, a palaeo-ecologist from the French Institute for Andean Studies in Lima, Peru.
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