"Someone told me it's all happening at the zoo"

In this quote, Paul Simon is referring to the idea that there is a lot of excitement and activity occurring at the zoo. Making use of the word "someone" recommends that the info was handed down to him by another person, adding a sense of mystery and intrigue to the statement. The phrase "it's all happening" implies that there is a lot going on, perhaps more than one would expect at a common zoo check out. This quote could also be translated as a metaphor for the chaotic and unpredictable nature of life, with the zoo representing the world and all its happenings. In general, this quote catches the sense of marvel and liveliness that can be found at a zoo.