- Fossils are not absolute timekeepers, because we have little idea of the rate of evolution; they are only relative timekeepers, which enable us to check off the period of deposition of one formation with that of another. [Please select]
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This device has not been improved upon, and is still used in observatories and other places where timekeepers of extreme precision are required. [Please select]
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Soon there were crowds of thousands, and as stevedores there began bawling out names, gang after gang of men stepped forward, until at last the chosen throngs went marching in past the timekeepers. [Please select]
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