Hidden secrets refer to information or knowledge that is not readily visible or known to the public. These secrets can exist in various forms, such as personal experiences, historical events, or even in nature. For example, ancient civilizations often left behind artifacts that hold clues to their way of life, which can be considered hidden secrets waiting to be discovered. In literature and storytelling, hidden secrets often drive the plot and character development. Characters may have past experiences or motivations that are not immediately revealed, creating suspense and intrigue. This concept is prevalent in works by authors like Agatha Christie, where the unraveling of hidden secrets leads to surprising conclusions.