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10 Paul Seabright, The Company of Strangers: A Natural History of Economic Life (Princeton: Princeton University Press, 2004), 261 n. 2; M. Henneberg and M. Steyn, ‘Trends in Cranial Capacity and Cranial Index in Subsaharan Africa During the Holocene’, American Journal of Human Biology 5:4 (1993): 473–479.

11 Nicholas G. Blurton Jones et al., ‘Antiquity of Postreproductive Life: Are There Modern Impact on Hunter-Gatherer Postreproductive Life Spans?’, American Journal of Human Biology 14 (2002), 184–205.

12 Kim Hill and A. Magdalena Hurtado, Ache Life History: The Ecology and Demography of a Foraging People (New York: Aldine de Gruyter, 1996), 164,236.

13 Hill and Hurtado, Ache Life History, 78.

14 Vincenzo Formicola and Alexandra P. Buzhilova, ‘Double Child Burial from Sunghir (Russia): Pathology and Inferences for Upper Paleolithic Funerary Practices’, American Journal of Physical Anthropology 124:3 (2004), 189–198; Giacomo Giacobini, ‘Richness and Diversity of Burial Rituals in the Upper Paleolithic’, Diogenes 54:2 (2007), 19–39.

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