Of course they can be questioned. If you're actually trying to mount a serious challenge to the presentation, though, the questions should be directed toward the scientists who established the veracity of the museum's various facts, they're the ones in a position to answer, not a museum tour guide. And your questions better have more substance than "Doesn't evolution break the 2nd Law of Thermodynamics?" if you expect your challenge to be taken as serious.
(Good to see ya around again, by the way.)
Good to see you too. :)