Time travel could theoretically allow someone on Mars to observe their past self traveling there, contingent on discovering the correct method of time travel. The discussion highlights the complexities of faster-than-light (FTL) travel and its implications, particularly through Lorentz transformations, which suggest that one could arrive at a destination before departure. However, this concept raises significant concerns regarding causality, which is a fundamental principle in physics. The conversation also touches on quantum entanglement, suggesting it may challenge traditional notions of cause and effect by allowing instantaneous interactions. Overall, the relationship between time travel and space remains a complex and debated topic in theoretical physics.