The “Earth is a realm” quote is often wrongly attributed to Nikola Tesla in flat-Earth communities and incorrectly regarded as “evidence” that Tesla believed Earth is flat.
Someone wrote pseudoscientific drivel and added an actual quote by Nikola Tesla. Flat-Earthers wrongly assume both statements are by Tesla & it became a hoax claiming Tesla was a flat-Earther.
The quote by Tesla was taken from “The Problem of Increasing Human Energy,” in which Tesla mentioned the word “globe” 12×, “gravity” 4×, “planet” 10×. It is clear Tesla was not a flat-Earther.