Why don't you post the name of the museum and the name (or a description) of the guide you described? That way, everyone here will know what museum is disseminating information like this, surely interesting to those on both sides of this debate. Don't remember the guides name, older about 65 or so, proably retired. Kinda thin male. Boston Museum of Science.
But, having been there on more than one occasion, it is not just him, seems they all say the same thing. Kinda like canned ham.