In class last year, why weren't quotation marks mentioned as a type of punctuation marks?

What about this type--"I like chickens." "David said, 'I like chickens.'"? You see those all the times in books.

We learned about the big bang, stars nebula. Two asteroids collided and moved an inch, and then landed on the earth and that's why the dinosaurs died. Copernicus' book was banned by the church because it said the earth revolved around the sun, but Galileo read it. He was the first to see the moon through a telescope.

I ate lunch with Kai.