In short: The phenomenon of "boats disappearing over the edge" can be reproduced over known flat surfaces at smaller scale. The conclusion is that the environmental factors of temperature and humidity have more to do with what causes objects to appear to sink than a physical dropping away of the land/water.
dicedice 3 points 2.8 years ago
Sky Free has an excellent series collecting data and observations on the subject.
Here is a summary video
https://www.youtube.com/watch?v=B3h00DXoLS0
In short: The phenomenon of "boats disappearing over the edge" can be reproduced over known flat surfaces at smaller scale. The conclusion is that the environmental factors of temperature and humidity have more to do with what causes objects to appear to sink than a physical dropping away of the land/water.