20 EXPERIMENTS that anyone can do, that PROVE there is no "curvature" to the earth's surface! You CANNOT live on a ball 25,000 miles in circumference unless you can DEMONSTRATE the .666 feet of curvature SQUARED required by spherical trigonometry, for a sphere of 25,000 miles in circumference! There's nothing left to talk about! That's the end of it! You can either DEMONSTRATE this non-existent "curvature" and prove your THEORY. Or you cannot, which DISPROVES the THEORY! Every 10 linear miles of the earth's surface (including the water) MUST have a demonstrable "curvature" of 66.69 FEET! So when you are looking out across the earth there MUST BE 66.69 FEET of "rise" between you and the 10 mile marker of your vision, in ALL directions! That is what .666 feet or 8 inches per mile SQUARED equals at 10 miles... 66.69 FEET! So get a transit, theodolite, or a laser and DEMONSTRATE the required 66.69 FEET of "curvature" across a 10 linear mile stretch of earth for us... Or stop blabbering about your disproven THEORY! The Earth CANNOT BE A SPHERE 25,000 miles in circumference unless someone can DEMONSTRATE THIS CURVATURE! And I have yet to see ANYONE in history that can show it! But I'm willing to admit that I'm wrong... As soon as you can DEMONSTRATE that this "curvature" actually exists! NOT using theory or photos, but by taking measurements using transits, theodolites, or using a laser! https://sacred-texts.com/earth/za/za06.htm