Thanks mate.
Yes they are intriguing and some of the hypothesis are interesting. I don't really know what to think, the material composition of the Bosnian ones threw me a bit as it appears they are a geopolymer which suggest they were created as opposed to shaped. The rumours of the ancients having the ability to melt and shape rocks in South/Central America in antiquity is a technical theory which could have been an ability available to others around the world. Who knows? There are no definitive answers as yet.
Thanks for reading and commenting buddy, welcome back.