Time travel has long captivated the human imagination, from the pages of H.G. Wells to the theories of Einstein. But is it pure fiction, or could it one day become a scientific reality? According to Einstein’s theory of relativity, time is not an absolute constant—it bends and stretches depending on speed and gravity. We already know that astronauts experience tiny time shifts due to orbital velocity, a phenomenon known as time dilation. But large-scale time travel, especially into the past, remains speculative and fraught with paradoxes. Theoretical constructs like wormholes and cosmic strings have been proposed as potential time-travel mechanisms, though none have been observed or experimentally validated. If time travel were possible, it would open up vast opportunities—and immense risks. Historical events could be observed (or altered), future knowledge could be retrieved, and entire philosophical frameworks would be upended. But it could also cause temporal paradoxes—what happens if someone changes the past in a way that prevents their own future? Would we need strict laws of causality, or does quantum theory allow for multiple timelines? As physics advances and quantum mechanics becomes better understood, time travel may move from fantasy to fringe possibility. Even if it's never realized, the pursuit of it continues to inspire breakthroughs in cosmology, quantum theory, and metaphysics. Whether as a dream or a danger, time travel remains one of humanity’s most enduring and mind-bending frontiers.