20 mins of some additional footage apparently.There are a lot of questions still open to debate, and that's what is annoying people (myself included). As someone else put it "It turns out it's been a six year soap opera with the clever mysteries a by-product to keep you watching."
I heard somewhere that on the DVD they will answer some of the questions, although that could just be a ploy to get people to buy it!
I have no problem with leaving something with an ambiguous or multiple interpretations.The ending was anything but complex or philosophical. Only the mechanics of it were open to debate.
It is actually very funny. They constantly dodged questions by saying you never know answer to life's big questions. Then they went ahead and answered one of the biggest questions about humanity's existence and lifespan in definite terms.