Q:  What is black and white and red all over? 
A:  A newspaper!

Explanation:  This joke plays on the word red/ read.  “Red” is a color, like black and white.  “Read”(pronounced “red”)  is the past tense of read (every day I read, yesterday I read).  When your brain hears red after hearing black and white it assumes that the speaker is talking about colors.  In this case the speaker is talking about the past tense verb read.  A newspaper is black because of the ink and white because of the paper.  It is read all over because you can read it anywhere in the world.  Funny!