- What are you doing?
- Eh, catching up on the 20th century.

3 seconds sound clip from the DuckTales: The Movie (1990) movie soundboard.

You can hear this line at 00:21:17.202 in the Blu-ray version of the movie.

Quote context

[...]

- Ooh, wow! Ooh! Cold food closet.

- Where do you hang the chicken?

- Wait, wait, don't tell me. A rug beater.

- Uh-uh. Egg beater.

- Yes. Yes, I see. Back, you foul eggs. Back, I say!

- Wait! Come back! Where'd he go?

- Well, what do you know? Las Vegas must be some place if Caesar moved his palace there.

- What are you doing?

- Eh, catching up on the 20th century.

- You read the whole encyclopedia?

- Uh-huh. From cover to cover to cover...

- What's this? A baseball? A bowling ball? Cinderella's ball?

- No, it's a globe of the Earth.

- Get back. You mean the Earth isn't flat? I must've missed that part.

- Boy, he has been in that lamp a long time.

- I gotta check this out.

[...]