We are in fact slidding down a slope created by the gravity of the center of the earth. The old 'curved-spave' analogy is useful.
But what force is making us "slide down" these four-dimensional curves?
150- good question - "We are in fact slidding down a slope created by the gravity of the center of the earth. The old 'curved-spave' analogy is useful. But what force is making us "slide down" these four-dimensional curves? "