What scientific experiments have been invalidated by extinction phenomena?

mtworkowski@o
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what experiments, if any, have been invalidated by the extinction phenomena.
 
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I do not think your question as stated is very understandable.
The first thing I don't understand is what you mean by "invalidate an experiment" ?
An experiment which has been correctly done is merely an observation of Nature and can not be invalidated, unless it has been done wrongly.

http://wordnet.princeton.edu/perl/webwn?s=valid
well grounded in logic or truth or having legal force, or still legally acceptable
You can invalidate an interpretation, but not an experiment.

you mean optical extinction ?
 
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