The nature of spacetime remains a central unresolved issue in physics. Originally separate, space and time were unified by special relativity, reflecting the invariant speed of light across inertial frames. This article presents spacetime much like an abstract mathematical framework encoding frame-independent energy-momentum relations and other Lorentz invariants. By focusing on energy, it offers a novel perspective to address persistent challenges and deepen understanding of fundamental physics.
Md. Jafrul Hassan (Tue,) studied this question.