Archaeological studies or investigations of Aboriginal and Torres Strait Islander people and culture in Australia have had many different agendas through time. Initial archaeological investigation was often focused on finding the oldest sites. By the 1970s, archaeological research was concerned with the environment and the way it impacted on humans. In the late 1970s cultural heritage management gained prominence, with the increasing demands by Australian Aboriginal and Torres Strait Islander groups for representation in archaeological research. At a research level the focus shifted to cultural change of Australian Aboriginal and Torres Strait Islander people through time.