If you're a fan of megalithic sites, this information is not new to you. Many ancient megalithic sites from all around, while different in looks and overall design share some surprisingly similarities in construction. The knobs seem to be the more of a head-scratcher when it comes to explaining their purpose. On first glance most people write them off to being a point of leverage or point to strap a rope or log to-as a way of transporting the rock from quarry's. But tests have shown that most knobs aren't placed on a point for sufficient leverage, or ideal point for strapping. While some have pointed out that some knobs have been "sanded down" on some blocks, so what we see now are just the ones forgotten to be knocked down, or were just left as they were. While others claim it to be an aid it tuning the site to a certain frequency. The clamp joint's found are obvious, cut the necessary shape on two adjoining blocks, pour molten metal in the void and it keeps the blocks snug together-ideally through all natural disasters (ex:earthquakes) but how did all these different peoples from around the world have the same idea? With these examples, and more to come with more and more excavations happening, its obvious the ancient world was much more connected than explained by modern academia, and ideas and techniques were shared across the globe at a much earlier time than can be explained today.

https://youtu.be/Fm_kieh9tck - Music is annoying, but this guy did some heavy leg work in putting all these examples into one video. No narration.

https://youtu.be/1ZWmnaLzJqE -brian forester knobs in peru

https://www.youtube.com/watch?v=cCEIUd5w6y8 -mystery history, quick and easy explanation of the clamps

https://youtu.be/dtgDe2S0KQY -same annoying music guy, but again, great leg work on compiling all the examples of clamping in one video