This is a thought I had a while back having to do with the pyramids and other ancient stone monuments worldwide. The general theory is that the people who built these amazing structures were said to have used bronze tools, as they were built allegedly during the bronze age in many cases. Some of the stones are extremely hard. Now I work with stone for a living and I use steel chisels. These modern and very hard steel tools work well until they dull. I have taken bronze and copper and tried to chip away at stone and you know, that doesn't work very well. The tools blunt and bend and leave a nice bronze metallic smear, yet when you look at the pictures of these ancient stones not a bronze smear in sight, even when they pull the stones apart. Plus they would have needed mountains of these chisels to do anything and yet very few are found and they would have had sharpening stations to keep them useful which would have left piles of shavings and bronze dust even if they were very careful and cleaned the areas well. Any ideas on whats up with that?