Now this comes from a, this
piece of it comes from a 2003 paper by a planetary scientist named Jack
Wisdom at the Massachusetts Institute
of Technology; and what he discovered is that you can move, as you [were describing] through curved space by moving, [let's] say, your arms and legs, or if you're an alien as it is described in the article, a tripod alien — just for the simplicity
of demonstrating how the movements are with, sort
of, heavy feet and a ball at the end
of the tail that helped to move the [weight] around, just to make it kind
of simple to look through — you can move through curved spacetime without pushing against anything, and this is the key here.