Jehovah's Witnesses? I have a really serious question?

Do you think that the NWT leaves out some things? I like it talked about how Jehovah created the heavens and the earth, but it never mentioned anything about dinosaurs. But yet there is blatant PROOF that dinosaurs existed via fossils, and museums. And what about the 2012 prophecy? People are thoroughly convinced that this is going to be the end of the world because of polar shifts and Nibiru and blah blah. My mom for example, believes that this is real because it's not mentioned in the bible. But there's proof of it about every 3600 years Nibiru pes through etc, and 2/3 of the population will be wiped out. It's so annoying! I don't know what to believe.