All those stars and such (the stars in the scientific sense, not the sexy green alien chick) had me thinking about ancient navigation techniques and how it was even close to possible for people several thousand years ago to have the slimmest chance of getting back to the port they started from and not being devoured by the sea monsters that I have no doubt lived back in the olden days. In retrospect, I suppose I shouldn't have been talking about all that during the actual movie.
Since the double AA battery had not been invented yet, the use of their Garmin GPS devices was completely out of the question. Maps were all sketchy, and even the lowly but useful sextant had not been invented yet.
However, evidence shows that the ancients had a 'half-sextant' to determine latitude (North-South location) based on the height of North Star off the horizon. Longitude (East-West for fellow Texans that might not be familiar) was more difficult to determine because they had to burn candles or use hour glasses to take into account the time because the earth was spinning back then. Examples of these angled inclination measuring devices have been found in Egypt, and surprisingly, the same angle and design has been scribbled on cave walls in South America. Could there have been Egyptians at some point in South America? No, the pyramids in South America are completely different than the Egyptian ones. Or, maybe the peoples of ancient South America just happened to have had the same good idea?
A word of warning for everyone though... Some research shows the axis tilt of the earth varies between 22 and 24.5 degrees in a cycle of 41,000 years. So if you happen to be using an ancient incline measuring navigational instrument because the backup batteries in your GPS are out, please be careful, because it will probably get you lost a little.
Egiziani antica dispositivi utilizzati per trovare la latitudine... Forse sono stati anche in Sud America??????