| | Heavy hearts and heads held high — A review of Glimpses of Creatures in Their Physical Worlds Received 1 December 2009; accepted 3 December 2009. published online 04 February 2010. Economic Science Institute, Chapman University,Orange, CA 92866, USA PII: S1090-5138(09)00130-5 doi:10.1016/j.evolhumbehav.2009.12.002 © 2010 Elsevier Inc. All rights reserved. | |
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