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Adrian Grahams began writing professionally in 1989 after training as a newspaper reporter.
His work has been published online and in various newspapers, including "The Cornish Times" and "The Sunday Independent." Grahams specializes in technology and communications.
He holds a Bachelor of Science, postgraduate diplomas in journalism and website design and is studying for an MBA.
Our understanding of the shape and pattern of the history of life depends on the accuracy of fossils and dating methods.
As an example of how they are used, radiometric dates from geologically simple, fossiliferous Cretaceous rocks in western North America are compared to the geological time scale.
Some critics, particularly religious fundamentalists, argue that neither fossils nor dating can be trusted, and that their interpretations are better.
Other critics, perhaps more familiar with the data, question certain aspects of the quality of the fossil record and of its dating.
This is because new sediments are always laid down on top of sediments that have already been deposited.
So, when looking at the history of a cliff face, it is important to read the story it tells from the bottom layer up.