Figure 1.4. A wide range of relatively simple storage structures have been utilized by man over the centuries. Storage pits have been described from the later stages of the Paleolithic period (Shanidar cave).58,59 Storage pits are found with increasing frequency at sites dating from 9000-7000 BC and some display distinct technological improvements (e.g. plastered walls).49 Taylor60 suggests that the “Neolithic Revolution” - the time period when man began to make the transition from a hunter-gatherer subsistence - could with equal justification be called the “storage revolution.” Storage facilities can be separated into above and below ground structures. Below ground structures were often preferred due to the simplicity of construction and greater security, especially during more turbulent periods, since the store can be more easily hidden. Shown are examples of grain (A) and potato (B and C) storage pits6 and present day sweetpotato storage in the Pingyin area of China.