Mosa Mack is the protagonist of our mysteries. At the beginning of each mystery, Mosa Mack is presented with a problem. She arrives at the mystery with no more background information than our students, and is therefore able to authentically model scientific thinking. In the mystery, she asks questions, gathers evidence, makes hypotheses, adjusts or rejects her hypotheses and actively thinks through the question until she believes she’s come to a conclusion supported by the evidence she’s gathered.