Answer:
Because ....
Explanation:
In museums there is usually information about certain object. And about other information?
Usually there is a group of people who check the information, compare it to other similar ones and then "publish" it (hope I used the correct word)
That's the reason why information in museums is usually quite correct
Though hope someone else answers your question too
Like the question you asked about, it's always better to have other sources of information to compare with
