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how old is the earth? and how do we know? who determined it talkie-1930
The earth is at least 80,000,000 years old. This conclusion has been arrived at by geologists, partly from the study of stratified rocks, and partly from the consideration of living organisms. Strata have been formed, quietly, one upon another, in many parts of the world, from the earliest times down to the present day; and the thickness of some of these strata amounts to several thousand feet. Now, it is plain, that a long period must have elapsed, during which such beds could be accumulated. Then, again, certain living species have continued unchanged from the beginning of the stratified formations up to now; and, as no such species have become extinct, it is argued that the earth must have existed, at least, from the first appearance of these organisms. In round numbers, we may say, that the earth has been a globe, fit for the habitation of living beings, at least 80,000,000 years. |