physics of time travel

Time travel involves manipulating spacetime, a fabric combining space and time as described by Einstein's theory of relativity. Moving close to light speed causes time dilation, where time for the traveler passes slower than for others, effectively "traveling" into the future. Wormholes, theoretical shortcuts through spacetime, may enable movement between distant points in space and time. However, practical challenges and paradoxes—like altering past events—make time travel speculative. Current physics suggests certain forms are possible under extreme conditions, but they remain unproven and theoretical.