Cranium Command the walls hung propaganda posters encouraging guests to enlist in the "Cranium Command" (similar signage could be seen advertising the show around the Wonders of Life pavilion). Also there was signage including brain teasers and humorous gags and puns, setting the stage for both the concept and tone. Guests were then led into a narrow, tall room with brightly colored carpeted walls. Facing the guests was a plain movie screen, and closed automatic doors to their left. The movie screen would soon illuminate showing an animated segment featuring the boisterous and loud General Knowledge (voiced by Corey Burton) briefing his
Ndutu cranium 600,000 years. Other estimates based on the association of the Ndutu deposits with the Masek Beds at Olduvai suggest an age approaching 400,000 years. The Ndutu cranium was badly damaged and fragmented when it was found. The pieces of the skull were repaired and reconstructed by R J Clarke who made the initial description of it. According to Clarke, the Ndutu skull seemed to form a link between "Homo erectus" and archaic "Homo sapiens", due to it having certain features in common with both. The occipital was well preserved and almost completely intact. The temporals were damaged; the left temporal