The term 'Slices of History' can be broken down into two crossword solutions: ERAS (4 letters). An era is a period of time in history that is characterized by certain events, developments, or cultural movements. It is often used to refer to a long period of time, such as the Middle Ages or the Renaissance. The term can also be used to refer to shorter periods of time, such as the Victorian Era or the Roaring Twenties. In either case, ERAS are important for understanding the development of human societies and cultures over time.