Physics is the science of reality, and as such it depends on how reality exists (in space) and how it changes (in time).
These contentors of existence and change do not act independently, but instead they interact mutually as parts of a geometric entity called spacetime since Minkowski declared it.
The geometrical properties of scpacetime are responsible for most of the striking features in modern physics, which can be understood, presented and explained drawing on their geometric nature.