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(Author’s note: I’ve archived the old concave Earth theory article here for past reference). This new article is split into 10 pages for easy download. Each page is accessed under the ads at the end of the article or via the link before that. I’ve also now kept the menu at the top of each page for easier navigation.

There are six pieces of direct evidence, that I know of, which purport to show that we live inside a concave Earth (Dyson sphere). None of this evidence is 100% conclusive at the moment, but one item is very close. There are also three pieces of indirect evidence which by process of elimination usually rule out the three other models – convex heliocentric, convex geocentric, and flat earth.

Direct evidence

1. Old maps

2. Modern maps

3. 19th century balloon observations

4. Tamarack mines

5. Laser between two posts

6. Rectilineator

Indirect evidence

7. Huge horizons

8. Binocular effect

9. Bendy light

10. Overall conclusion

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Direct evidence

1. Old maps

Donald Sarty (YT name: Sumstuff52) has found old maps in the Glen McLaughlin Map Collection dating from the 17th, 18th, and even as late as the 19th century (but mostly 18th) whose latitude and longitude lines have been curved “the other way” than we are used to. This curvature gives them the appearance of concavity rather than convexity. Below are a few examples out of many.

How did these maps come about? We can only speculate, but there are a couple of clues. 1. After checking quite a lot of these maps, the earliest date I found which showed earth as a concave sphere was 1625, with most of the Glen McLaughlin Map Collection dated between early-and mid-18th century (1700 to 1770?). 2. All these maps from this collection show California as an island or with the peninsula much higher up than where it is depicted today. Was this because of bad cartography via insufficient knowledge? Not exactly; at least according to this website:

Although explorers and map makers as early as 1548 knew that California was a peninsula, many maps from the 17th and 18th centuries depict California as an island.

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If they knew the truth but still drew California as an island anyway, were these maps copied from much older sources – pre-1548? Correct source maps of California may not have been available to the cartographer and so older source maps had to be used. Perhaps these world maps are collections of much older smaller maps of local areas which show neither convexity nor concavity, such as this one from 1548. Could California really have been an island or a pennisula at the time of the creation of the source map? Salton Sink is below sea level and so is Death Valley above it. You will also see lots of lakes above death valley nearly all the way up to Seattle. This is a definite possibility.

However, a few later concave sphere maps (but still pre-1800), outside the Glen McLaughlin Map Collection, show California as it is today. Here are a couple below which show California more or less correctly. The north pole looks very interesting too.

Most importantly, if you type in “map of the earth 1600” into an image search engine, nearly all the maps of the entire “globe” show a concave sphere. The same applies to “ancient maps of the earth” or “ancient maps“. Even typing “globe” into the keywords – “ancient maps of the globe” brought a total of five convex old world maps with many more concave ones evident.



Donald’s video showing only a very small handful of ancient concave maps.

This shows that nearly all the cartographers in the renaissance (early 1600s) thought the Earth was a concavity, not a convexity. What happened at this time? The “primitive” man idea is ruled out because Concave Earth Theory (CET) is counter-intuitive. Previous to early 1600 AD only Plato believed that we lived inside a concave Earth (Phædo). The Earth (e.g. water) looks like a flat plane to the horizon and so an uneducated man would presume that the Earth was flat. Mathematicians and astronomers in the Middle Ages presumed the Earth was geocentric convex, thanks largely to the publication of Ptolemy’s Algamast… or so we are told. This latter model is also intuitive, as the heavens look to be rotating around the Earth.

If CET was suddenly discovered by a group of cartographers around 1600 AD, was it discovered through experiment or through a new religion/philosophy? Science was extremely fledgling if non-existent in 1600 AD; although mankind may have been able to have reproduced something akin to the 1897 rectilinear experiment privately. The Rosicrucians for example were rumored to be scientifically far ahead of their time in the 1600s. What new philosophy or religion could have sprung up around 1600 AD to influence cartographers to produce cavity maps? At this time, neither religion nor experiment purporting Earth’s concavity is documented anywhere that I know of, but that is not to say these documents could perhaps exist or that the experiments were either deliberately not documented (private), or the documents have been lost.

Either way, these maps aren’t supposed to exist within the official history of cosmology… yet they do. We are told the cosmological transition is from geocentric convex in the Middle Ages to heliocentric convex in the enlightenment era until today. All ancient world “globe” maps should therefore be convex, yet they are nearly all concave. Something is glaring missing from history.

The official story has been shown to differ from reality with Newton. It is said that Newton thought that gravity was a pull by the large mass of the Earth, yet in his letters it is shown that he thought gravity was the exact opposite – a push on mass by “spirit”. It wouldn’t be too much of a stretch to assume that Copernicus and/or Galileo really thought that the Earth was concave rather than convex. Who has the power to hide or even forge documents? Who educated the masses in the early-to-mid 19th century? The Church.

Conclusion

Overall there is a good possibility that the original knowledge-holders had discovered that the Earth was concave by rational means, but we can never know for sure… and if they did, I can’t find any documents to show this. These maps should at least pique the interest of the curious mind however; and show that Concave Earth Theory is definitely not new. On that basis I give this piece of evidence only a 10% chance for a concave Earth.