Barbie's body shape becoming a reality?

Could humans be developing bigger heads and therefore, bigger brains? The University of Vienna has published a study which suggests that the increasing number of C-sections may be affecting human evolution. Before C-sections were so common, natural selection would have it that fetuses with large heads did not survive birth. Bruce Floyd, a senior lecturer in biological anthropology at the University of Auckland, researches human development and biological variation, and speaks to 95bFM reporter Martha Lees.