:I don't dispute that what the museum presents contradicts what the vast majority of scientists believe. 

 :What I am disputing is this 99% figure.  What's the source for this?  If it comes from a Wiki page about the wide acceptance of the theory of evolution, than it's irrelevant because evolution doesn't tell us the age of the earth. 

 :The science field that is relevant in regards to the age of the earth is geology.  Do you have a source that shows 99% of geologists believe the earth is 4.5 byo?  I don't question that the percentage, whatever it may be, is approximately 99% but if we are going to put a hard number in an encyclopedia entry, then it needs to be sourced.