91 New sources of copper were developed in other countries

Matthijs Randsdorp, "A Closer Look at Copper," November 3, 2011, TCW, https://www.tcw.com/News_and_Commentary/Market_Commentary/Insights/11-03-11_A_Closer_Look_at_Copper.aspx.

92 by 500 first-year a.s.sociates

John Markoff, "Armies of Expensive Lawyers, Replaced by Cheaper Software," New York Times, March 5, 2011.

93 300,000 miles in all driving conditions without an accident

Rebecca J. Rosen, "Google's Self-Driving Cars: 300,000 Miles Logged, Not a Single Accident Under Computer Control," Atlantic, August 9, 2012.

94 employed in the United States alone as taxi drivers and chauffeurs

U.S. Bureau of Labor Statistics, as cited in the Statistical Abstract of the United States: 2010, Table 640, http://www.census.gov/compendia/statab/.

95 in part for cultural reasons-to go into savings instead of consumption

Mauricio Cardenas, "Lower Savings in China Could Slow Down Growth in Latin America," Brookings Inst.i.tution, February 11, 2011, http://www.brookings.edu/research/opinions/2011/02/11-china-savings-cardenas-frank.

96 developed through the much older technologies of metallurgy and ceramics

Caltech Materials Science, "Welcome," 2012, http://www.matsci.caltech.edu/.

97 "physical powers which will enable it to super-organize matter"

Eric Steinhart, "Teilhard de Chardin and Transhumanism," Journal of Evolution and Technology 20, no. 1 (December 2008): 122.

98 the molecular economy

Christopher Meyer and Stan Davis, It's Alive: The Coming Convergence of Information, Biology and Business (New York: Crown Business, 2003), p. 4.

99 experiments in the real world

Ibid., pp. 36, 6667.

100 molecules when they are cl.u.s.tered in bulk

John F. Sargent Jr., "Nanotechnology: A Policy Primer," Congressional Research Service, April 13, 2012, http://www.fas.org/sgp/crs/misc/RL34511.pdf.

101 resistance to stains, wrinkles, and fire

Ibid.

102 hospitals guarding against infections

"Nanotech-Enabled Consumer Products Continue to Rise," ScienceDaily, March 13, 2011, http://www.sciencedaily.com/releases/2011/03/110310101351.htm.

103 copper emerged in numerous locations in the same era

Miljana Radivojevia et al., "On the Origins of Extractive Metallurgy: New Evidence from Europe," Journal of Archaeological Science, November 2010.

104 combines high temperatures and some pressurization

Richard Cowen, "Chapter 5: The Age of Iron," April 1999, http://mygeologypage.ucdavis.edu/cowen/~GEL115/115CH5.html.

105 more than 1,000 years later in Britain

"Bronze Age," Encyclopaedia Britannica, http://www.britannica.com/EBchecked/topic/81017/Bronze-Age.

106 4,500 years ago in northern Turkey

Cowen, "Chapter 5: The Age of Iron."

107 from which it could be made into tools and weapons

Ibid.