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Thanks for that. I guess it is a bit of a clunky sentence - though less so when put into context, as the answer to the question, "where is the Earth in the universe, and what shape is it?" "'Where are we?' That's a pretty profound question. If we didn't know where we are we'd be like monkeys in...

Concur. I don't think it's fair to quote your posts from facebook in this thread, and I'd like to see the conversation move on from that, and focus on the data. Apologies for quoting your externally written words - I think they were your words - in a post above. Did Stephen Hawking really say...

In a lot of ways, I would agree with this. I think the level of accuracy demanded in the build up to the Balaton experiment has been of a vastly larger degree than that demanded of experiments that we happen to agree with. And, likewise, I've seen conclusions on here reached and accepted with...

Agreed. :)

To me, the helicopter demonstration is about as clear as it gets when it comes to showing the effect of the earth's curvature. A helicopter hovers at an altitude of 24 feet, and to an observer six miles away it looks as though it's on the water/horizon. Then it descends towards land, and...

Nice work on the calculator, Mick: you've made what was already awesome even more awesome. I always thought for my dream calculator it would include the ability to enter latitude and longitude coordinates, which would then convert to the earth's radius using a geoid height calculator. A few...

If we take the 70-mile 'flat' surface of the Salar de Uyuni and scale it down to draw an arc of 7 inches in length, the "bulge height" of the arc will be 0.015 inches (or 0.39mm). I imagine that would be quite difficult to observe with the naked eye, even up close. But perhaps to get a more...

Your earlier question was "how far away would you have to be for them to disappear?" (6 miles) while the question above is about a "drop" (3 miles). Do you understand why these are different questions, with different answers? Also, to show it theoretically, refer to the diagram on the curve...

If there was no refraction, being 6 miles away from them should do it. That's the Salar de Uyuni in Bolivia, by the way. Interesting article talking about how flat it is, and also places where it bulges slightly due to variations in the strength of gravity and dense rocks several kilometres...

So I calibrated the app again using the spirit level and took a series of photos from various elevations. I think after this I can safely conclude that the app is bunkum (has been debunked?) and that I wouldn't necessarily conclude anything from what it told me. Still, here are the results...

I've been playing with it the last few days and, though it claims an accuracy of 0.1°, I'm not sure I'd trust it even to 0.5° - it sometimes returns results significantly different, even of the same shot. Plus, because the on-screen elevation is usually a long way out, and calibration is done by...

So I finally got around to shelling out my £4.49 for the Hunter Theodolite App to see if I could measure some horizon droppage in the real world. The first thing to note is that the bloody thing is not easy to calibrate. I used a good spirit level, I used measuring heights above the water in a...

Rather than thinking of the level of water as being a flat plane, think of the level (sea, lake, etc) as meaning "the same distance from the centre of the earth" (ie, the centre of gravity). This formula is the one used to calculate what is commonly referred to as the "drop". More pertinent to...

Anybody else remember when "ny" was spelled "my"? Defiantly was in ny universe. Also, differing to ZW, I pacifically remember James Cagney saying, "You dirty rat! You killed my brother" - and now when you look for someone called James Cagney apparently he never even existed. Plus I also...

Here's a video of a guy measuring the angle between Warren Dunes State Park and Chicago with a theodolite: He gives a couple of pages of figures showing his data and results: I guess there are issues with it being impossible to know whether one is looking at the 'real' Chicago (Nowicki's...

I had been thinking recently that any wide-angled, suitably elevated, high-res photo of the horizon ought to show some sign of curvature when looked at in extreme close up using software. I mean, even if it showed only a few pixels' worth of deviation from a straight line, doesn't that...

I probably shouldn't do this, but I'm going to defend Icke and expose Ronson, whose writing and personality I really, really like. Thing is, truth is truth, right? And I found something interesting while reading this excellent book. Exhibit A: Ronson's account of David Icke's infamous...

Stewart Lee sums up CT science in 61 seconds:

Nice work @Trailblazer! The mystery of Camp Vell is solved. :) I'd happily do more, if they were requested, and hadn't already been debunked on some of the excellent blogs that deal with this list. For my own purposes, I feel pretty satisfied, but if it's good for others I'll gladly get stuck...

SPOILER ALERT: This post is very boring, and mostly pointless: not even flat earthers use this 'proof', and Dubay seems to have gone somewhat out of fashion, but I include it here because: a) I did the research already; b) others debunking his list on their blogs hadn't quite figured this one...