"The film serves its target audience well enough and offers a series of pleasant smiles if not a lot of gut-busting laughs."

To answer the obvious question, the makers of Ice Age: Dawn of the Dinosaurs are well aware that the dinosaurs came and went long before the film takes place. What happened, though, is that some of the dinosaurs survived in a huge, cavernous world underneath the ice, and in this sequel our mammalian heroes stumble across them. So it's not a "dawn of the…