I assumed the appendix was once our second stomach, but we don't eat the same types of food we once did so there is no need for it anymore.
I've never done any research into that though. I think my dad told me it when I was a kid. And my dad never lied!
Well, apart from when he told me that gypsies stole children, or when he told me that he buried my dead hamster in the park but he really flushed it down the toilet, or had me convinced that the local library was infact a prison for naughty young boys.
Hmm actually he lied about a lot things lol