How old is the Earth?

[Statler Waldorf]

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Hahahaha. I am seriously starting to worry about you. My whole point of the "Earth's Circumfrence" argument was to point out how small of an observable area you would have compared to the whole Earth's Circumfrence when compared to 100 years to 4.5 billion years. This shows how it would be impossible to conclude how far around the Earth is if you were only able to observe a tiny section of the Earth,

That's the dumbest thing you have said yet. The circumference of the earth WAS measured without seeing a massive portion of it. The circumference/radius of the earth was discovered by Eratosthenes in 170BC, he used the distance between two locations and the difference in sundown between the two locations.

"Eratosthenes calculated the circumference of the earth without leaving Egypt. Eratosthenes knew that on the summer solstice at local noon in the Ancient Egyptian city of Swenet (known in Greek as Syene, and in the modern day as Aswan) on the Tropic of Cancer, the sun would appear at the zenith, directly overhead. He also knew, from measurement, that in his hometown of Alexandria, the angle of elevation of the sun would be 1/50 of a full circle (7°12') south of the zenith at the same time. Assuming that Alexandria was due north of Syene he concluded that the meridian arc distance from Alexandria to Syene must be 1/50 of the total circumference of the earth. His estimated distance between the cities was 5000 stadia (about 500 geographical miles or 800 km) by estimating the time that he had taken to travel from Syene to Alexandria by camel. He rounded the result to a final value of 700 stadia per degree, which implies a circumference of 252,000 stadia. The exact size of the stadion he used is frequently argued. The common Attic stadion was about 185 m,[9] which would imply a circumference of 46,620 km, i.e. 16.3% too large. However, if we assume that Eratosthenes used the "Egyptian stadion"[10] of about 157.5 m, his measurement turns out to be 39,690 km, an error of less than 1%."

http://en.wikipedia.org/wiki/Eratosthene...cumference

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Somoone needs to brush up on basic reading comprehension. He used the ponit between two cities (much farther apart than 3.5 inches), he also used the sun, which is not part of his allowed observable area. If you were only allowed to observe a portion of ground 3.5 inches long, and that was it- you could not conclude the circumfrence of the Earth. Nor would you be able to conclude what the rest of the Earth's surface looks like. I am sorry, can't do it. Impossible. It is just as impossible it observe the decay rate of radio-metric elements for less than 100 years and conlude they have always been the same. Insignificant figures! It's basic stastics.