Christopher Columbus was an Italian explorer, navigator and colonizer who "discovered" America.
History
Ms. Hoover asked her class an oral extra-credit question and it was about what was Christopher Columbus actually looking for when he discovered America. Lisa knew the answer, but Allison Taylor was faster. [1]
When Marge stared to use the Internet, Lisa told her that she was proud on her and she was like Christopher Columbus, because Marge discovered something millions of people knew before her. [2]
Appearances
Episode – "Lisa's Rival" - Episode – "Marge Gamer"