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Understanding the ages of related fossil species helps scientists piece together the evolutionary history of a group of organisms.

For example, based on the primate fossil record, scientists know that living primates evolved from fossil primates and that this evolutionary history took tens of millions of years.

CARBON-14 IS CREATED (Figure 1a): When cosmic rays bombard the earth’s atmosphere, they produce neutrons.

By comparing fossils of different primate species, scientists can examine how features changed and how primates evolved through time.

To demonstrate that the rates of decay of unstable nuclei can be measured, that the exact time that a certain nucleus will decay cannot be predicted, and that it takes a very large number of nuclei to find the rate of decay.

Free 5-day trial Use this quiz/worksheet combo to help assess your knowledge of how radioactive dating works.

Some of the topics you will need to be aware of include how to measure the age of a rock, what an atomic clock means, and what method of radioactive dating would be used for an Egyptian mummy.

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While there are some holes in the historical record, as well as a few anomalies, inconsistencies, and obvious errors in the dating charts, the information complied and presented here is the most comprehensive data we have available for dating Guild guitars.

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To give the knee joints extra strength when carrying cumbersome loads, an electromagnetic tensor field kept the overstressed motive assembly in smooth alignment.

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Jones, started ranting about how his show was “filth,” that was kind of sad.