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19-Dec-2016 16:46

The interest in Rontgen’s discovery would launch the second scientific revolution; the first being launched by the work of Galileo (Asimov, 1984, pp 514-515).In 1896 Rontgen demonstrated the use of X-rays to view skeletal structure by taking a picture of the German biologist Rudolf Albert von Kolliker’s (1817-1905) hand.To see how we actually use this information to date rocks, consider the following: Usually, we know the amount, N, of an isotope present today, and the amount of a daughter element produced by decay, D*.By definition, D* = N-1) (2) Now we can calculate the age if we know the number of daughter atoms produced by decay, D* and the number of parent atoms now present, N.

But, how can we determine how old a rock formation is, if it hasn’t previously been dated?

Early attempts at establishing an absolute time scale utilized the following concepts: declining sea levels, cooling of the Earth, cooling of the Sun, Earth tidal effects, sediment accumulation, and changes in ocean salinity.



This will enable crucial intelligence to be gathered and preventative action to be taken.… continue reading »


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These compilers preserve the semantics of the original program, but instrument either the source code or object code to produce a dynamically updateable program.… continue reading »


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