A first trailer for Walking With Dinosaurs is now online and can be viewed over at MSN. The preview–which will no doubt remind many of Disney’s Dinosaur–shows off the movie’s blend of live-action and CGI animation. The story, according to the film’s plot summary, follows “two brothers looking to follow in their fathers footsteps, which leads to a showdown with dinosaurs in the arctic north.” The movie comes to theaters in 3-D this Christmas.