Parallel realities, also known as parallel universes or alternate dimensions, refer to the idea that multiple, distinct versions of reality exist simultaneously. Each reality may have different outcomes, events, or even laws of physics, leading to variations in how life unfolds. This concept is often explored in science fiction and quantum physics, suggesting that every choice or event could create a branching path into a new reality. The theory of parallel realities posits that these alternate dimensions could coexist alongside our own, potentially allowing for interactions or travel between them. While still largely theoretical, the idea raises intriguing questions about the nature of existence and the infinite possibilities that could arise from different decisions or circumstances.