Hands? Or tools? It’s still very intriguing since rope is believed to be created sometime a bit less than 5,000 years a go. If it’s believed to be not nearly that old then it’s still very odd to know that someone tried to work with this size of blocks and for what purpose?

I haven’t seen limestone being cut by saws or chains, it if that’s an easier method wouldn’t it bear very visible line cuts on both facing surfaces?

In my opinion its certainly man made. Seeing many other megalithic structures throughout the world I can confidently say that we most likely have no idea how they cut and moves giant stones into place. This seems to be a similar case seeing how well the cut is made pulling a rope back and forth will not provide a straight cut