`Ain Ghazal people buried some of their dead beneath the floors of their houses, others outside in the surrounding terrain. Of those buried inside, often the head was later retrieved and the skull buried in a separate shallow pit beneath the house floor. Also, many human remains have been found in what appear to be garbage pits where domestic waste was disposed, indicating that not every deceased was ceremoniously put to rest. Why only a small, selected portion of the inhabitants were properly buried and the majority simply disposed of remains unresolved. Burials seem to have taken place approximately every 15–20 years, indicating a rate of one burial per generation, though gender and age were not constant in this practice.