In response to Don Wiss' query about water consumption it is important to remember that the majority of hominid sites uncovered are found near a site of fresh water. Thus it would be relatively simple for hominids from very early times to drink water throughout the day as long as they stayed near home. It would only be those who were foraging some distance or who were perhaps journeying to another place that would need to carry water and even these would doubtless have knowledge of water sources on the way unless they were exploring new territory. If we go back further, to a savannah primate model, then we find primates such as a baboon troup for example, visiting a water source twice a day. Lorraine Heidecker California State University Sacramento