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Heat flow through the left nasal passage of a (a) Homo heidelbergensis, (b) Homo neanderthalensis, and (c) Homo sapiens (UNC002). (d) Homo sapiens (ULAC210). (e) Homo sapiens (UNC013). Heat transfer is shown in cross sections taken at numbered regions in each nasal passage, and shown under both 100 ml s−1 and the mass-dependent flow rate.
