Sea with cliff covered in a while material (bird guano), with birds flying around.
The #ChinchaKingdom was an ancient community that flourished in southern #Peru. Farmers produced high yields of maize. Scientists said the farmers were able to get those high yields because they used bird guano (bird droppings) as fertilizer. π¦π½
buff.ly/GeLyYZo
πΈ Jo Osborn/ Univ. of Sydney.