Pete Oxford / Amerindian woman, Winifred Brown, model released, using a Matape to strain liquid from mashed Cassava to make Cassava flour, Katoka, Rupununi, Guyana, February 2010. Model released

Colin Monteath / Salt spring and mine first mined by Incas in 1400s, Urubamba Valley near Cuzco, Peru

Colin Monteath / Salt spring and mine first mined by Incas in 1400s, Urubamba Valley near Cuzco, Peru

Colin Monteath / Huayna Picchu peak and Urubamba Valley from terraces below Machu Picchu near Cuzco, Peru

Colin Monteath / Inca laboratory possibly used for testing seeds and plants before planting in wider district, Urubamba Valley near Cuzco, Peru

Colin Monteath / Alpaca (Lama pacos) trio above Machu Picchu near Cuzco, Peru

Colin Monteath / Machu Picchu above Urubamba Valley, view from Huayna Picchu peak near Cuzco, Peru

Colin Monteath / Machu Picchu at dawn above Urubamba Valley near Cuzco, Peru

Colin Monteath / Alpaca (Lama pacos) and young with woman dressed in traditional Quechua clothing, Sacsahuayman, above Cuzco, Peru

Pete Oxford / Tortoise carapace used by Shuar Indian as percussion instrument, Coca, Amazon, Ecuador

Christian Ziegler / Embara Indian man with collected plants used for medical purposes, Chagres River, Barro Colorado Island, Panama

Pete Oxford / South American River Turtle (Podocnemis expansa) researchers weighing individual, part of captive breeding program, Orinoco River, Apure, Venezuela