• PNAS Teaching Resources Portal
  • Science Sessions: The PNAS Podcast Program
September 22, 2009; 106 (38)

Cover image

Cover image expansion

Cover image: Pictured are anterior and lateral views of a Neandertal (La Chapelle-aux-Saints) cranium (Left) and a modern human (Cro-Magnon 1) cranium (Right). Timothy Weaver outlines competing hypotheses explaining the cranial features of Neandertals—climactic adaptation, anterior dental loading, and genetic drift—and suggests reasons why Neandertals and Pleistocene modern humans tend to have different overall skeletal morphologies than Holocene humans. See the article by Timothy Weaver in the Out of Africa: Modern Human Origins Special Feature on pages 16028–16033. Image by Chris Stringer (Natural History Museum, London) and the Musée de l’Homme (Paris).

Online Impact

  • 667601844 2018-01-21
  • 385442843 2018-01-21
  • 496686842 2018-01-21
  • 915288841 2018-01-21
  • 885256840 2018-01-21
  • 726268839 2018-01-21
  • 25737838 2018-01-21
  • 143837 2018-01-20
  • 725372836 2018-01-20
  • 469379835 2018-01-20
  • 935424834 2018-01-20
  • 37813833 2018-01-20
  • 904770832 2018-01-20
  • 626160831 2018-01-20
  • 447659830 2018-01-20
  • 133161829 2018-01-20
  • 190427828 2018-01-20
  • 734726827 2018-01-20
  • 956922826 2018-01-20
  • 93519825 2018-01-20