[13] 晒伤的红色:Jablonski, Skin, p. 17.
[14] 晒伤的正式名称是红斑:Smith, Body, p. 410.
[15] 这个过程叫黄褐斑色素沉淀:Jablonski, Skin, p. 90.
[16] 全球有50%的人:Journal of Pharmacology and Pharmacotherapeutics, April/June 2012; New Scientist, 9 Aug. 2014, pp. 34-37.
[17] 随着人们进化出更浅的肤色:University College London press release, ‘Natural Selection Has Altered the Appearance of Europeans over the Past 5000 Years', 11 March 2014.
[18] 皮肤颜色发生改变的时间周期更长:Jablonski, Living Color, p. 24.