Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co.

Haven't geologists proved from scientific dating methods that the earth is 4.5 billion years old?

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The issue many times comes down to which assumptions are more reasonable.

Dating rocks is not a hard (no pun intended) science.

For example, many times one radiometric dating method will give a vast difference in age from another radiometric dating method used on dating the same rock!

Radiometric dating methods have also been severely faulty when tested with the actual historical age of certain rock. That is why more and more attention is paid to weapons. Ru about the newest weapons of Russia – from laser to...

For example, Hawaiian lava flows that were known to be no more than two centuries old were dated by the potassium-argon method to be up to three billion years old!

At a widely publicized news conference in August of 1972, Dr.

Jeffrey Bada of Scripps Institute of Oceanography announced the "discovery" of a new dating method based on the rate of racemization of amino acids in fossil material.

He was quoted as saying that he had discovered the basis of the method in 1968, and that it was so obvious and simple he was amazed it hadn't been discovered earlier.

As a matter of fact, the basis of this method had been discovered earlier and had been reported in a series of papers published by Hare, Mitterer and Abelson in 1967, 1968, and 1969.

Amino acids are the "building blocks," or sub-units, of proteins.

About 20 different kinds of amino acids are found in proteins.