Example 16.1: Finger ratios
----inferred from Manning, J. T., P. E. Bundred, D. J. Newton, and B. F. Flanagan. 2003. Evolution and Human Behavior 24: 399–405.
Example 16.2: Wolf inbreeding
----Liberg, O. H., H. Andrén, H.-C. Pedersen, H. Sand, D. Sejberg, P. Wabakken, M. Akesson, and S. Bensch 2005. Biology Letters 1: 17–20.
Question 16.3: Godwits
----Gunnarsson, T. G., J. A. Gill, T. Sigurbjörnsson, and W. J. Sutherland. 2004. Nature 431: 646.
Question 16.8: Earwig forceps
----Tomkins, J. L. and G. S. Brown. 2004. Nature 431: 1099-1103.
Question 16.10:Cricket immunity
----Simmons, L. W. and B. Roberts. 2005. Science 309: 2031.
Question 16.11: Pufferfish mimicry
----Caley, M. J. and D. Schluter. 2003. Proceedings of the Royal Society of London Series B, Biological Sciences 270: 667–672.
Question 16.12: Telomeres and stress
----Epel, E. S., E. H. Blackburn, J. Lin, F. S. Dhabhar, N. E. Adler, J. D. Morrow and R. M. Cawthon 2004. Proceedings of the National Academy of Sciences (USA) 101: 17312–17315.
Question 16.13: Language and grey matter
----Mechelli, A., et al. 2004. Nature 431: 757.
Question 16.14: Green space
----Fuller, R. A., K. N. Irvine, P. Devine-Wright, P. H. Warren, and K. J. Gaston. 2007. Biology Letters 3: 390–394.
Question 16.16: Liver preparation
----Smallwood, R. H., D. J. Morgan, G. W. Mihaly, and R. A. Smallwood. 1998. Journal of Pharmacokinetics and Pharmacodynamics 16:397-411.
Question 16.17: Sleep and performance
----Huber, R., M. F. Ghilardi, M. Massimini, and G. Tononi. 2004. Nature 430: 78-81.
Question 16.19: Lefthandedness and violence
----Faurie, C. and M. Raymond. 2005. Proceedings of the Royal Society of London B 272: 25–28.
Question 16.20: Trillium
----Jules, E. S. and B. J. Rathcke. 1999. Conservation Biology 13:784-793.
Question 16.21: Cocaine
----Volkow, N. D., et al. 1997. Nature 386: 827-830.
Question 16.22: Cocaine
----Collins S. and G. Bell. 2004. Nature 431: 566-569.