The Aka or Biaka (also Bayaka, Babenzele) are a nomadic Mbenga pygmy people. They live in south-western Central African Republic and in northern Republic of the Congo. They are related to the Baka people of Cameroon, Gabon, northern Congo, and southwestern Central African Republic. Unlike the Mbuti pygmies of the eastern Congo (who speak only the language of the tribes with whom they are affiliated), the Aka speak their own language along with whichever of the approximately 15 Bantu peoples they are affiliated. In 2003, the oral traditions of the Aka were proclaimed one of the Masterpieces of the Oral and Intangible Heritage of Humanity by UNESCO. They were featured in the July 1995 National Geographic article "Ndoki: the Last Place on Earth", and a 3-part TV series. Society A traditional hunter-gatherer society, the Aka have a varied diet that includes 63 plants, 28 species of game and 20 species of insect, in addition to nuts, fruit, honey, mushrooms and roots. Some Aka have recently taken up the practice of planting their own small seasonal crops, but agricultural produce is more commonly obtained by trading with neighboring villages, whom the Aka collectively term as Ngandu. From the Ngandu, they obtain manioc, plantain, yams, taro, maize, cucumbers, squash, okra, papaya, mango, pineapple, palm oil, and rice in exchange for the bushmeat, honey, and other forest products the Aka collect. There are over 15 different village tribes with whom the approximately 30,000 Aka associate. As a result of their hunter-gatherer lifestyle, which frequently exposes them to the blood of jungle fauna, they have among the highest rates of seropositivity for Ebola virus in the world. Parenting Fathers of the Aka tribe spend more time in close contact to their babies than in any other known society. Aka fathers have their infant within arms' reach 47% of the time and make physical contact with them five times as often per day as fathers in some other societies. The men also help the women, by feeding their children. It is believed that this is related to the strong bond between Aka husband and wife. Throughout the day, couples share hunting, food preparation, and social and leisure activities. History The lifestyle of the Aka has been shifted from their traditional customs by European colonialism. The slave trade of the 18th century caused the migration of several tribes into Aka lands. These tribes subsequently became affiliated