archie bunker wrote:
The thermometer was invented in the early 1700's. So how do they know?
The Aliens have scientific data, archie. Al Gore has special connections, and we all know that the polar ice caps are going to melt and the sea levels are going to rise. Tomorrow.
Analysis of antarctic ice cores allows estimation of surface ocean temperatures going back in time. The ratio of Oxygen O-18 to O-16 depends on the surface temperature of the ocean. Thus by estimating when the ice was deposited and analyzing the O ratio a good estimate of temperature by year can be obtained.
I've seen a similar report on PBS some years ago. Scientists drilling core samples in the Antarctic ice caps had a sample core which they dated back to the time of King Arthur which they said indicated that the earth was 1*f warmer. So I guess we could attribute that to Merlin ?
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