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quote:Originally posted by HadrianWould we be still be maritime based or could we have developed other forms of mass
quote:Originally posted by another_someoneThe first wheeled carts were also not capable of covering rough terrain. This made them well suited to flat desert warfare, but since the height of technology in the early Americas was in more mountainous terrain, it would have been less of an advantage to them even if they did have an animal with which to pull the chariots.George
quote:Originally posted by eric lIf wheeled carts were so useful in flat desert warfare, how do you explain that nomads in the Sahara desert do not use them, but rely almost exclusively ont the camel !
quote:Originally posted by eric lHi, George,Of course there is quite a difference between warfare and transportation. But there is another point you (and I) overlooked. At the age when the wheel was invented / developped Egypt was probably not a desert, and neither was Persia. In fact, Egypt was the main supplier of grain to the Roman Empire !And wheels are bound to work better on flat compact soil than on loose sand.
quote:Climate changes and/or overgrazing around 8000 BC began to desiccate the pastoral lands of Egypt, eventually forming the Sahara (c. 2500 BC), and early tribes naturally migrated to the Nile river where they developed a settled agricultural economy and more centralized society.
quote:Originally posted by eric lGeorge, you're quite right. But aren't we drifting away from our wheels.Anayway, this shows again than when "no man is an island", no topic in science is either. Even an item that seems to deal exclusively with mechanics has links to history, geography and many other branches of knowledge.
quote:One thing I keep wondering about is this : which came first : wheels for transport or wheels as stationary machines (which would be the potter's wheel).
quote:he Bronocice pot is a ceramic pot incised with the earliest known image of what may be a wheeled vehicle. It dates from just after 4000 BC, and is firmly attributed to the Funnelbeaker archaeological culture. The pot was discovered at an archaeological site near the Polish village of Bronocice, and is housed in a museum in Krakow. Historical implicationsThe image on the pot might imply the existence of wagons in Poland ca. 4000 BC. They were presumably drawn by cattle (barely tamed aurochs at that point in time), because sheep or goats could not have pulled something heavy. It raises questions about the original invention of the wheel, because a four-wheeled wagon is a relatively complicated use of a wheel.
quote: And can the spindle that is still used by some nomad tribes to spin wool from their sheep or goats, or the bow-lathe, be considered as "proto-wheels" ? Both are machines to convert a to-and-fro movement into a rotational movement.
quote:Originally posted by eric lAbout the spindle : I remember some documentary (it may have been an episode in Bronowki's "Accent of Man") where nomad women seemed to be playing with a kind of yoyo, but where actually spinning wool with it.