Interstellar takes plenty of artistic license, but it gets the core physics right: mass curves spacetime, speed curves time itself. If you travel near light speed and then reverse to come home, your clock has taken the shorter path through spacetime—so you come back younger, while everyone you knew has aged or died. But here’s the twist people miss: if Earth somehow chased you down at relativistic speed, the symmetry flips. Their turnaround would be the frame change, and they’d be the ones who a

Chat I Found a Time Machine

11 Time-Travel Movies to Watch After Netflix’s 'The Adam Project'