From a physicist's standpoint, time travel is not ruled out outright but is heavily constrained. General relativity admits exotic solutions with closed timelike curves, yet these require unrealistic conditions such as infinite cylinder rotation or exotic matter with negative energy density. Quantum field theory adds further restrictions via the chronology protection conjecture, suggesting that quantum effects would destabilize any macroscopic time machine. Meanwhile, experimental evidence confirms that forward time travel—time dilation—is a measurable, everyday phenomenon exploited in technologies like GPS. Thus, while backward travel remains speculative and likely forbidden by deeper principles, journeying into the future at different rates is an established fact of relativistic physics.