Introduction

This book spells out in detail how the age of the Earth has been determined over the centuries. First — the "biblical" age: how was the date of Creation 4004 BC figured out? A date which is so important even today ... it is the basis of claims made by millions that the Earth is only about 6000 years old.

Historical Perspectives

Next — the response of geologists (and Darwin) for a very old Earth. Then, Kelvin's calculation of how long it would take for a hot Earth to cool down to its present state.

Modern Understanding

And finally, today's answer ("billions"), based on the properties of radioactive materials.

Question

So, how old is Planet Earth?

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