Transient, or ephemeral, refers to something that lasts for a very short time. This term is often used to describe events, experiences, or objects that are temporary in nature. For example, a rainbow appears after a rain shower but fades away quickly, illustrating the beauty of fleeting moments. In nature, many organisms exhibit transient characteristics, such as mayflies, which have a brief adult life span. Similarly, certain art forms, like sand sculptures, are created to be enjoyed for a limited time before they are washed away or eroded. Transience highlights the importance of appreciating moments as they come.