WHAT ARE THE MYSTERIES OF LAKE MUNGO? is the latest fascinating history mystery to be added to the Australian History Mysteries subscription website -- www.australianhistorymysteries.info/. It is a multimedia education resource for lower secondary students. It is designed to fulfil the Australian Curriculum History requirement that students explore the nature of the sources for ancient Australia and what they reveal about Australia's past in the ancient period, using the discovery of Mungo Lady and then Mungo Man as a case study. Students 'visit' the World Heritage Willandra Lakes site, of which Lake Mungo is part, through a 25-minute virtual visit film. They see both the environment, and the archaeological evidence that exists about life in that place in ancient times. They realise that the Lake Mungo of today is not the same as Lake Mungo in the past. And they are challenged to solve some of the mysteries of that past! They now use a variety of photocopiable worksheets to use evidence to work out their own answers to a series of questions or mysteries about what Lake Mungo was like 40 000 years ago, how people lived there in the past, how it became what it is today, and how we can we reach these conclusions.