World Hisory(middle school) Unit 1: The First Humans Prehistory-3500 BCE What was life like 10,000 or a 100,000 years ago? How Have people and cities changed over time? These are some of the questions history tries to answer. HISTORIANS are the scholars who study our past, using written records and historic art to find the answers. They read letters, look at written laws, and study religious doc..