Time travel is the concept of moving between different points in time, much like we move through space. Imagine being able to visit the past to see how people lived or to witness important events, like the signing of the Declaration of Independence. Alternatively, you could jump into the future to see what life will be like, perhaps meeting advanced robots or exploring new planets. In stories and movies, time travel often involves special machines or devices, like the famous TARDIS from Doctor Who or the DeLorean from Back to the Future. These adventures spark our imagination and raise questions about how our actions in the past could change the present or future.