Adelaide Zoo, already home to 3,400 animals representing nearly 300 species of exotic and native mammals, birds, reptiles, and fish, just acquired a new specimen: Homo exhibitionist. For 28 days, four sets of six volunteers get to spend a week living the life of an animal, foraging and playing and partying like it's 1999 million years ago. The idea is to raise popular awareness of conservation matters, in particular the preservation of apes in the wild, whose plight is described on signs around the 50-by-65-foot enclosure, and to finance a new enclosure for apes at a sister zoo, all the while conducting behavioral research study about how creatures cope living paw by jowl in such a close setting.