no it was Magellon who sailed around the world...proving it round although didn't Drake do it too? All Columbus did was claim land for spain that no one... Christian owned... He didn't find the New World, in fact there are some who beleave he just took older tales and went further south...... So... technically he just foundout it didn't end where mainstreem (vikings were NOT Mainstream) Europe thought it did...
As for Presidents, I can't actually say i am that surprised now... since I talked to a ladyfriend of mine and she didn't remember the first 4 either... started saying things like Roosevelt.. (she's 50 years old)...
I remember the first 4 after that it begins to get iffy... and after Jackson... i don't really remember any of them up to Lincoln, then it's Lincon, Johnson (number 1), Grant... then no memory again...Taft maybe... lol.
I'll give someone who can name all the presidents that were in office in or after world war 2 a magical imaginary 20 dollars (if they do it without looking too )