Factual error: Dexter the capuchin is in the African mammal display. Capuchins come from South America.
Factual error: Sacajawea was not a "tracker." Lewis and Clark hired her husband, Toussaint Charbonneau, and her as interpreters, because she spoke the Shoshone language. (She was 16 and pregnant at the time).
Factual error: During one of the first scenes with Teddy Roosevelt he has a small "2" on his collar above his Cavalry crossed sabers. However, his "Rough Riders" were in the 1st Cavalry Regiment. Later in the movie he's wearing the correct "1" there. (00:36:20)
Factual error: The tablet was said to be 24kt gold. Something of that size in gold would be very heavy, but the kid carries it around like it has very little weight to it.
Factual error: When Larry is running away from Attila the Hun into the elevator, he pushes both hall buttons (up & down). When the elevator is descending, the indicator shows him going down from the top floor. The top floor only has a down button. Also, in that type of Otis elevator, when both buttons are pushed, the up light goes out first, indicating the elevator is answering an up call. The doors would recycle to answer the down direction before the down light would go out.
Factual error: The movie is set in the New York Natural History Museum, and there is a T-Rex skeleton in the movie. However there is no T-Rex skeleton in the Natural History Museum. There is a model T-Rex and a T-Rex skull, but no full skeleton.
Factual error: Columbus is consistently depicted speaking Italian. In reality, he spoke Spanish, Latin and Greek but never Italian.
Answer: Columbus is speaking Italian. The first night, when Larry asks him about the lions, he says "Go find the lion somewhere else" and then "tourist!" The second night, when they're chased by the animals, he says "Young man, do your job well, take care of the beasts" and when he sees that the window's open, "Kid, what do you say, shall we close the windows?" The last night, when Columbus is guiding the Neanderthals, he says "Fellow Neanderthals, with me!" and to the night guard "It's over!"