How seabird poop helped fuel ancient civilizations in Peru
via news.mongabay.com
Short excerpt below. Read at the original source.
The Chincha Islands off the coast of Peru are home to many seabird species that cover their island homes with thick layers of poop, or guano. New research now suggests that ancient Peruvians in the Chincha Valley on the Peruvian mainland hunted these seabirds, collected their guano, and used it to fertilize their maize crops, […]