Tim M. Berra

Creationists often attack the claim that the earth is known to be 4.5 billion years old. Some argue that the earth was created as recently as six thousand years ago, and they question the radiometric dating methods used by scientists to come up with the 4.5—billion—year estimate.

In this selection Tim M. Berra contradicts the claim by creationists that radiometric dating methods are likely to be mistaken. Radioactive decay, he says, proceeds at an "utterly constant rate," and the measurements have been performed thousands of times by many different scientists. The age of the earth has been established beyond all reasonable doubt. Berra received his Ph.D. in biology from Tulane University. He is a two—time recipient of the Fulbright Fellowship. Currently he holds the position of professor emeritus at Ohio State...