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An interpopulation comparison demonstrating statistically significant differences between the roundness of the foramen magnum between Peruvians and roundness of crania from individuals of African and Bengali populations. The difference between means of African and Peruvian foramen magnum roundness was 0.072 ± 0.022 (mean ± standard error of the mean). The difference between means of Bengali and Peruvian foramen magnum roundness was 0.059 ± 0.016
