I don't like eating at McDonald's very often, but when I do, I like to get chicken nuggets. 
McDonald's is a fast food company that was founded in 1940 as a restaurant operated by Richard and Maurice in California
1940? Wow, that's a long time. I wonder what the first McDonalds restaurant was like.
It was later changed to be a business as a hamburger stand.
Interesting, so hamburgers were their main dish? I wonder how it got so popular.
Hamburger,beefburger or burger is a sandwich consisting of one or more cooked patties of ground meat
I've never heard it called a beefburger. I really like hamburgers though, especially with cheese and bacon.
Hamburger most likely first appeared in the 19th or early 20th century.