Evolution of Sexual Dimorphism in New Zealand Giant Moa (Dinornis) and Other Ratites,”
Proceedings of the Royal Society B 280 (2013).
“We live in a zoologically impoverished world”: Alfred Russel Wallace, The Geographical
Distribution of Animals with a Study of the Relations of Living and Extinct Faunas as Elucidating the Past
Changes of the Earth’s Surface, vol. 1 (New York: Harper and Brothers, 1876), 150.
“At Big Bone Lick the first explorers”: Robert Morgan, “Big Bone Lick,” posted online at:
http://www.big-bone-lick.com/2011/10/.
purchased for himself the teeth: Charles Lyell, Travels in North America, Canada, and Nova
Scotia with Geological Observations, 2nd ed. (London: J. Murray, 1855), 67.
“great modification in climate”: Charles Lyell, Geological Evidences of the Antiquity of Man,
with Remarks on Theories of the Origin of Species by Variation, 4th ed., revised (London: J. Murray,
1873), 189.
“I cannot feel quite easy”: Quoted in Donald K. Grayson, “Nineteenth Century Explanations,”
in Quaternary Extinctions: A Prehistoric Revolution, edited by Paul S. Martin and Richard G. Klein
(Tucson: University of Arizona Press, 1984), 32.
“There must have been some physical cause”: Wallace, The Geographical Distribution of
Animals, 150–51.
“Looking at the whole subject again”: Alfred R. Wallace, The World of Life: A Manifestation of
Creative Power, Directive Mind and Ultimate Purpose (New York: Moffat, Yard, 1911), 264.
“When the chronology of extinction”: Paul S. Martin, “Prehistoric Overkill,” in Pleistocene
Extinctions: The Search for a Cause, edited by Paul S. Martin and H. E. Wright (New Haven, Conn.: Yale
University Press, 1967), 115.
“Personally, I can’t fathom”: Jared Diamond, Guns, Germs, and Steel: The Fates of Human
Societies (New York: Norton, 1997), 43.
Then, rather abruptly: Susan Rule et al., “The Aftermath of Megafaunal Extinction:
Ecosystem Transformation in Pleistocene Australia,” Science 335 (2012): 1483–86.
Alroy has used computer simulations: John Alroy, “A Multispecies Overkill Simulation of
the End-Pleistocene Megafaunal Mass Extinction,” Science 292 (2001): 1893–96.
humans “are capable of driving”: John Alroy, “Putting North America’s End-Pleistocene
Megafaunal Extinction in Context,” in Extinctions in Near Time: Causes, Contexts, and Consequences,
edited by Ross D. E. MacPhee (New York: Kluwer Academic/Plenum, 1999), 138.
CHAPTER XII: THE MADNESS GENE
“It must be admitted”: Charles Darwin, The Descent of Man (1871; reprint, New York: Penguin,
2004), 75.
Boule invented: James Shreeve, The Neanderthal Enigma: Solving the Mystery of Human Origins
(New York: William Morrow, 1995), 38.
“distinctly simian arrangement”: Marcellin Boule, Fossil Men; Elements of Human
tuis.
(Tuis.)
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