So what did they do with the flint tools beside scrape an other flint.
They used them as knives and spearheads for hunting. Then they used them to cut up the meat for cooking and eating. They scraped and cut the hides to make clothes and bags. They cut wood for fires.
But as I mentioned earlier, one of the first things they did with their flint knives was to scrape the leftover meat off of the bones left by predators. This greatly increased the protein content of their diet. Brains use a lot of protein so this allowed each subsequent species to evolve a larger brain.
As I noted in an earlier post, flint tools were not invented by
Homo sapiens. They go back millions of years to an earlier species of hominid.
Could they cut a piece of wood that would look like a wheel?
I suppose they could cut a piece of wood that
looked like a wheel, but it would not have been strong enough to
function as a wheel, except in a toy. As I noted earlier, you can't make a wheel out of a cross-section of a trunk or branch, even though it looks sorta round, because you've cut all the fibers in the wood, leaving it with no
tensile strength. It can't flex under pressure, it will just break apart. Wheels have to be cut from boards, which leave long fibers in the wood. And you can't cut a board with a flint blade. Well, maybe if you spent a whole year doing it very carefully, you might be able to cut
one board. You need thin, sharp, precise metal blades to cut boards. That's why the wheel could not be invented until the Bronze Age, which began around 3000BCE.
I doubt the American indian had a wheel.
You haven't been following the timeline in this discussion. Some of the eastern North American Indian tribes had just barely entered the Neolithic Era when the Christian destroyers arrived. They were growing crops, living in permanent villages, trading with each other, and if I'm not mistaken they had domesticated a few small animals. (Besides the dog, which was brought over from Asia by their ancestors.)
But the Neolithic Era is still the
Late Stone Age. Metallurgy had not yet been discovered so they were still limited to tools made of stone and wood. There was no way they could have invented the wheel.
I believe the Maya indian have made pillars in a round shape and they had item made in a round shape.
Again, you're just not keeping up with the discussion. Metallurgy was discovered in the New World at about the same time as it was in the Old World. Both the Olmecs in Mesoamerica and the ancestors of the Incas in South America had learned to smelt gold and copper. In fact evidence was recently discovered of copper mining in Michigan around 5000BCE, which is
earlier than the Bronze Age in Eurasia. This information is difficult to correlate, since there is no evidence of these people actually building a Bronze Age civilization. In fact, as I noted above, all the tribes of North America north of the Rio Grande were still in the Early Stone Age or Late Stone Age when the Europeans arrived. It may just be one of the many sad cases of a community making a wonderful discovery, and then failing despite it, due to other reasons.
I believe the Maya indian have made pillars in a round shape and they had item made in a round shape
Please try to keep up with the timeline. The Maya were the heirs of Olmec culture. They inherited all the culture and technology of the Olmecs. They had bronze tools for the precise working of stone. When Maya civilization began to decay, the Aztecs took over. Mexico was under their control when the Europeans arrived.
Neither the Aztecs in Mesoamerica nor the Incas in South America discovered iron metallurgy, so they were no match for the Christian armies.
And not that much hotter either.
Uh... the melting point of iron is 2800F/1500C. Copper melts at 2000F/1100C, tin at 450F/230C. That's a big difference.
Why, when they had made tin and copper, did they not experiment with other ores?
They were working gold and silver. They didn't have the Periodic Table as a reference, so they had no idea how many other metals the earth had to offer.
If they had, they would have succeeded in producing iron.
People first discovered iron in meteorites, which were just lying on the ground.
I don't know whether the following is urban myth or not, but it makes a good story.
The "horse's ass" explanation for railroad gauges is, indeed,
an urban legend.