And of course we all know that it wasn't Columbus or the vikings who discovered North America. It was people from what is now Asia.
Yes true, i didnt read the link, as i thought, that it was just about the way the vikings navigated, which they were known to use, rocks containing iron, which was used as a compass. After reading the article, i am not really convinced of the use of such a thing, even from the expirements the article talked about, they said they could see a change in the crystal in low light conditions, how relevant would that be for the purposes of navigation. Unless you know the precise time, the sun is not much good for navigation, other than telling you where east and west is, but if you have some form of compass, you already know where east and west are. Up until harris invented a clock that could be used at sea, longditude was found out by a lot of guess work, but latitude, was easy to find out but it was done using the pole star, If you do it using the sun, you need to know the time of meridian passage, but knowing that is no use to you, to you, unless you know the time at greenwich, or GMT, the sun is high in the sky over greenwich at 12 noon today, its high in the sky over my house at 12 noon local, which is 5pm GMT, so I am five hours from greenwich, which, is an hour, is fifteen degrees of arc, so i am 75 degrees west of greenwhich, Greenwich is on zero degrees, so i must be on 75 degrees, sorry made a mistake, forgot I was on summer time, so i have to add another hour of arc, making it six hours difference, six times fifteen, which puts me at 90 degrees west of greenwich, course, i would need to go out and take a sun sight to find the true meridian passage, because the sun is not going to be directly overhead of me at 12 noon local, but it will be directly overhead somewhere in my time zone at 12 noon, but with just sitting here, i have worked out my latitude to within four degrees of where I am, if u got my sextant out, i could get to almost my exact lattitude, but can only do that if i know the time are greenwich, and the vikings didnt know that.You didn't even read that article did you? the sun stones were not magnetic rock at all, but in fact transparent crystals. They did also have rudimentary magnetic compasses like you described, but they were far from accurate (also mentioned in the article).
The sun stones worked by depolarizing whatever light came thorough the atmosphere, and creating a bright spot from the direction the sun was at. This allowed them to "see" the sun, even in the near endless night of a artic winter where the sun never really rises and is never brighter than dawn/dusk. They found that with practice they were able to use the ancient stone found on the shipwreck to identify the direction of the sun to within a few degrees, even in near darkness. Impressive feat when using something from a wreck dating back many hundreds of years...
Certainly superior to all they came in contact with, but were they superior to the Pacific Islanders?
Their rudimentary compasses were not that accurate, So having a solar compass would have been very useful as a second tool to determine their position. Even without knowing the GMT knowing the position of the sun can be useful. I am not claiming they had this knowledge, but it is theoretically possible to take a magnetic compass bearing, compare to a solar compass bearing and determine your position if you know the date, and have a table of magnetic offsets to compare against. You will also need to have an understanding of the suns position and how it changes throughout the year (something man has understood for thousands of years).AtlanticAl said:they could see a change in the crystal in low light conditions, how relevant would that be for the purposes of navigation. Unless you know the precise time, the sun is not much good for navigation, other than telling you where east and west is, but if you have some form of compass, you already know where east and west are.
As you said yourself, they would need to have an understanding of where the sun is going to be, at it moves between the tropic of cancer, and the tropic of capricorn, and to use the sun, as your only fixed point of navigation to sail between say norway and Iceland, if you did it six months later, you would have to know the exact difference in where the sun will be in order to correct your course. Why go to all that trouble, why you can just use the pole start, and keep your boat at a certain angle to the pole star.Their rudimentary compasses were not that accurate, So having a solar compass would have been very useful as a second tool to determine their position. Even without knowing the GMT knowing the position of the sun can be useful. I am not claiming they had this knowledge, but it is theoretically possible to take a magnetic compass bearing, compare to a solar compass bearing and determine your position if you know the date, and have a table of magnetic offsets to compare against. You will also need to have an understanding of the suns position and how it changes throughout the year (something man has understood for thousands of years).
The only point I am trying to make is that to someone properly skilled it would be a useful additional tool to aid in navigation, and we all know not to go out and rely only on a single navigation tool (like GPS). We don't have any Viking navigation charts to reference, but maybe they had charted magnetic offsets and used the suns position each morning and night to calculate the offset for their current position as an additional reference item, really we just don't know how they used the stones, except that they did use them, which in itself means they were used to some degree of success.
Stonehenge is enough evidence to prove that they understand the annual movement of the sun, and long before the Vikings navigated the north Atlantic. Before GPS there was no navigational tool that worked 99+% of the time. Loran only worked near the coastline, a sextant doesn't work when it is stormy, and everything else before that was a crapshoot as to exactly how accurate it was with compounding margins of error.AtlanticAl said:they would need to have an understanding of where the sun is going to be, at it moves between the tropic of cancer, and the tropic of capricorn.
I think the facts would prove you wrong. While not literate in a way that most current folks think of being able to read and write, the Vikings did "write" on runes, and several have been found that detail the who and what of an epic battle. Icelandic research turns up quite a bit of "runic" inscriptions that we have yet to decipher.The vikings were illiterate, they didnt put anything in writing, so it would be very difficult for them to rely on the sun for navigation,
There are several theories using multiple origins of migration. I am aware of the theory you are describing based on different construction of arrow and spearheads dating back 12,000 years. There have also been discoveries in Chile of villages dating back 30,000 years. In these village shell/garbage pits have been found skeletal remains of deep water fish suggesting these villagers were not just sailors but sailors that sailed far from shore. As the evidence piles up, it seems people came to America from many different locations and the 10,000 year land bridge is to simplistic and it seems the first settlers were much more than just hunters and gatherers.John, if you've read the latest anthropological evidence concerning the discovery of America, the earliest finds are on the Eastern seaboard of the U.S. that pre-date the Bering Strait migrations by several thousand years.
I don't know "Rognvald", I don't think I have any bias for either Pacific Islanders or Vikings. Do you?John, when you define advanced or primitive civilizations, you must use a reference point(s). Did they possess advanced technology for their period? Were their social organizations conducive to success? Did they possess an artistic heritage? Was organzied education part of their culture? These are a few questions that must be addressed as well as: how did they compare to other known civilizations of their time? I think if you can address these issues without bias, your answer will be clear. Best, Ron