Before revision: monkey Monkeys sleep while sitting in trees, often upright!Monkeys eat plant-based foods, and also meat in the form of bird eggs, small insects, and lizards.A howler monkey can be heard up to three miles away....The Pygmy Marmoset monkey is the smallest monkey HistoryEarly models consisted of a monitoring box with a set of electrode leads which attached to the chest.
After revision: HistoryEarly models consisted of a monitoring box with a set of electrode leads which attached to the chest.