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	Renewal is an interesting problem. I wonder if anyone has 
devised a plan or scheme to determine when exhibitions have outlived 
their use from the visitors perspective which is implied in Peter's 
"They are failing in their inspiration/education role"?

I'd suggest another concern: that the science/technology of the 
exhibition has be surpassed by new developments/discoveries.

Martin

>
>
>Martin,
>
>Exhibits are removed and/or renovated when:
>
>They are failing in their inspiration/education role;
>They are maintenance problems
>They do not fit a new thematic plan.
>They are scruffy and let the ambiance down
>
>
>I don't know of any science center that removes because of age, per se.
>
>Peter Anderson
>
>


-- 
Martin Weiss, PhD
Science Interpretation
Consultant,
New York Hall of Science

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