When trying to explain past phenomena, historical scientists try to construct a set of [[hypothesis|hypotheses]] about the causes and then look for a so called "[[smoking gun]]", a piece of evidence which indicates that one of the hypotheses might be a better [[Explanation in science|explanation]] than the others.<ref>{{Cite journal
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Whenever science tries to explain a unique historical event or past phenomena, careful testing and repricability are ''by definition'' impossible.<ref>{{cite book
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|author=Michael J.Behe
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|title=Darwin’s black box, the biochemical challenge to the evolution. P.X Preface
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|publisher= Free press
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|place=NY
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|year=2006
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|pages=242
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|isbn=9780743290319
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|url=
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|quote= }}</ref> Instead, historical scientists try to construct a set of [[hypothesis|hypotheses]] about the causes and then look for a so called "smoking gun", a piece of evidence which indicates that one of the hypotheses might be a better [[Explanation in science|explanation]] than the others.<ref>{{Cite journal
| author=Cleland, C.E.
| author=Cleland, C.E.
| title=Methodological and Epistemic Differences between Historical Science and Experimental Science
| title=Methodological and Epistemic Differences between Historical Science and Experimental Science