Tracing the Incas...through llama poo?
The history of the Andes might well be written in llama poo. Researchers have found that in a small, dried-up lake in highland Peru, mites that ate these creatures' droppings closely track major historical events, including the rise and fall of the Inca Empire. One of the researchers, Alex Chepstow-Lusty from the University of Sussex, spoke to Newsday's Alan Kasujja about the discovery.
Photo: Llama grazing on a mountain overlooking Machu Picchu (Credit: BBC)