parse out how to depict time is a tricky appendage . When we tattle about time on a human scale — in seconds , minutes , days , years , decade — it ’s not so difficult to grasp . But when we pitch to the universe of discourse ’s graduated table and get down to grapple with zillion , matter get much more complicated .
CommenterSexyDinosaurCostumenominated the USGS visualizationGeological Time Spiral , which traces out 4.5 billion yr of history , giving us more detailed story of the period of time nearest our own . We especially wish the early bill of constitutional structures nail in the uttermost reaches of the spiral .
you may correspond out a full sized versionover at the USGS .
figure : Joseph Graham , William Newman , and John Stacy / USGS
Geologyusgs
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