Of the millions of artifacts on display and tucked away at the Smithsonian Institutions, some objects are bigger than others and even supersized. From a 60-pound salamander to a 17-foot-long beard, follow a few lucky visitors as they're taken behind the scenes to encounter some larger-than-life items. Then follow other visitors go on two off-site adventures as one gets a lesson in 22-foot tall totem-pole carving and the other encounters the fossils of a prehistoric, 500 pound sloth.