Did Noah Forget?

For all of those who take the Bible literally and believe in creationism, here is an unanswered question:  Where are the dinosaurs?  When Noah loaded up the art, how did he leave off theropods?  Did he forget to collect a pair of stegosaurians, certopsians, ornithopods, or sauropodmorphs?   One has to ask why triceratops were left off of the ark as well as how he could have forgotten to include a pair of brontosaurus?  One might also wonder why there is no mention of prehistoric animals in all of the Biblical writings.  Did they exist before the creation of Adam and Eve?  Were prehistoric creatures roaming the earth before the Garden of Eden or did they habituate the Garden of Eden along side Adam and Eve?  Perhaps there is an expert on creationism who has the answers to this mystery.  Did Noah forget to include these creatures and his lapse of memory result in their extinction?