Minkowski’s spacetime

As we have seen, time intervals, lengths, and simultaneity is relative and depend on the relative velocity of the observer.
velocity connects time and space
Let’s stop separating space and time, let’s rather talk about spacetime
spacetime is 4 dimensional, 3 spatial + 1 time dimension but is space and time really the same thing ?

As we have seen, time intervals, lengths, and simultaneity is relative and depend on the relative velocity of the observer.