title: A blow to the 'grandmother theory'.
authors.forename: A
authors.initials: A
authors.lastname: Gibbons
mesh_terms: D000818:Animals; D005260:Female; D006801:Humans; D008017:Life Expectancy; D008045:Lions / Q000502:physiology*; D008136:Longevity; D008593:Menopause; D010215:Papio / Q000502:physiology*; D012098:Reproduction