Mystery Skull Lab Report Example | Topics and Well Written Essays - 1000 words - 1

Mystery Skull - Lab Report Example The mystery skull has the values of these indices recorded as 65, 23 and 90 respectively. The skulls were first grouped with reference to the index of supra-orbital height and the specimens D, F, G, H, I and B whose scientific names are given in chart 1 were found to the potential identities of the mystery skull. The recorded values for the supra-orbital values were 70, 58, 58, 70, 66 and 70 respectively which were close to the mystery skull’s values of 65. The observation was then narrowed down to the index of nuchal area height and only three specimens (F, G and I) bore a resemblance to our mystery specimen with recorded values of 21, 23 and 12 referenced against the mystery specimen’s value of 23. A reference was then made to the index of the condylar position and we only remained with G and I (Homo erectus and Archaic Homo sapiens respectively). In order to separate the two specimens the non-index characteristics were observed and the physical traits of the specimens that match the ones of the mystery skull #1 were noted. The specimen G has thick eyebrow projection while that is not the case for specimen I. in this case the mystery skull is similar to specimen I. it is also observed that the specimen G has a protruding face when compared to both specimen I and our mystery skull #1. A look at the shape of the eye orbits suggests that our mystery skull is skull I since skull G has square eye orbits while I and the mystery skull both have oval eye orbits. The height of the nasal orbit is also shorter for g when compared to the height of G and the mystery skull #1. The index characteristics; index of supra-orbital height, index of nuchal area height and the index of the condylar position of the mystery skull #2 are recorded in the chart 1 as 71, 37 and 44.