Then, time-travel stories serve as a "narratological laboratory" (2). Wittenberg contends that the protagonist's time travel is just a literalization of what all tales do in their ellipses, flashbacks, stretching or shrinking of time, and rearrangement of chronological sequence. He argues that we learn more about the human condition through fiction than through science because science can only study the past or present, not the future. Time-travel narratives are stories that involve time travel, either actual time travel or fictionalized versions of it. They can be found across many cultures and periods in history. Time-travel narratives have been used to explore various ideas including causality, choice, destiny, freedom of will, predestination, paradoxes, probability, reality, time itself, and utopia/dystopia. The concept of time travel has intrigued humans for thousands of years. Ancient myths and legends include stories where this phenomenon is mentioned or occurs. Time travel is also an important part of many religions. For example, Judaism has many texts that discuss how God could have created everything in the universe in only six days and yet still have time to watch over each of us individually. Christianity discusses how Jesus was able to walk through walls, see into eternity, and even go back in time. Islam offers a similar discussion regarding the Prophet Muhammad.