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The Preenciple o Uniformitarianism is that the naitral processes o the past is the same as the nou. This is aften cried, "The praisent is the key tae the bygane." James Hutton developit this idea, that is sae important in modren sciences sic as geology, palaeontology, an astronomy.

In geology, uniformitarianism means that the processes shapin the yird the day is the same as in the bygane. We can uise whit we ken o the day tae unnerstaund the history o the yird.

In Hutton's day, this idea wis revolutionar. This wis acause the releegious thochts syne didna gree wi it.