its through such drilling that they can find the tree rings in the coral and thereby tell the growth, the chemical analysis, the trapped air samples, and then compare this data with the known information from the global climate record.
samples taken at different levels provide a developing picture of the relationship between the climate and the coral growth to show what is 'normal for the time and then compared with current data.
or are you one who believes that the past has nothing to teach us about our world?
