I saw a video where a man had a scale and a weight that he showed, then took went on an airliner a thousand miles away and showed the weight was slightly different. I googled "does gravity vary in different places?". I got results that said that due to different mass in different places, gravity does vary. Greater in mountains, less above trenches, which makes sense if gravity is attraction between masses as claimed by conventional consensus science.
Questions for FEs: Is this true, does gravity vary slightly in different places? Perhaps error or conspiracy? If gravity does vary, and gravity is due to universal acceleration (per the wiki?), does that mean that different places have slightly different acceleration? Seems to me that would distort the flatness over time. Places with less gravity would accelerate slightly slower, thus falling behind and so getting lower and lower compared to average, and mountains having more gravity would be accelerating. They would get continuously higher.
Should the universal acceleration theory be discarded, or is there an FE explanation for varying gravity?