TC> RT> I'm not a scientist, but my understanding is that isotope ratio
 TC> testing
 TC> RT> is a reliable way to ascertain origin. How 'bout it George???
 TC> I'm not a scientist, either, but I did take quite a few physics
 TC> and chemistry courses.  Naturally occurring isotope ratios are used
 TC> in several areas of science to determine place of origin, time since
 TC> an event, rainfall levels, etc. The key word, however, is
 TC> "naturally".  It's also possible to change the isotope ratio, such
 TC> as in uranium when it is enriched.
 oh....I thought you gentleman wanted a way of differentiating human from 
Extraterrestrial materials.  The isotope method you are thinking of work by 
comparing a constantly decaying ratio of a stable element to its unstable 
isotope (like radiocarbon).....I originally though you were wondering about 
the actual analysis of the atomic packing....what type of lattice structure 
are used...to show this e.t - human difference....anyhow I can not see 
radioactive dating methods being particularly important here....perhaps you 
misunderstood the original question which I remember asking it the test could 
be run of alloy and electronics....I could be wrong...just trying to help.. 
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