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History
IN OUR TIME
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THE ASCENDENCY OF MAMMALS
13 October 2005

The Ascendency of Mammals Clock- produced by Richard Corfield

The diagram shows a clock at the top of the image that represents the entire lifespan of the earth spanning 4 billion years. The enlarged segment close to midnight represents the age of mammals.
the age of mammals clock

View also Richard Corfield's The Cambrian age clock
View also Richard Corfield's The origins of Life clock

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