8
2. R. H. Cichewicz and P. A. Thorpe, “The Antimicrobial Properties of Chile Peppers (Capsicum Species) and Their Uses in Mayan Medicine,”
9
3. N. L. Jones, S. Shabib, and P. M. Sherman, “Capsaicin as an Inhibitor of the Growth of the Gastric Pathogen Helicobacter Pylori,”
10
4. P. Rozin and D. Schiller, “The Nature and Acquisition of a Preference for Chili Pepper in Humans,”
11
5. “McDonald’s USA Nutrition Facts for Popular Menu Items,” www.scribd.com/doc/222559/McDonalds-Nutrition-Facts.
12
1. Lynn Halpern, Randolph Blake, and James Hillenbrand, “Psychoacoustics of a Chilling Sound,”
13
2. Dogs can hear pitches up to 40,000 Hz; chinchillas have a hearing range like ours; mice ears register sound up to 91,000 Hz (but they have trouble with frequencies under 1,000 Hz); catfish are limited to frequencies under 4,000 Hz.
14
3. B. Kruger, “An Update on the External Ear Resonance in Infants and Young Children,”
15
4. Mark Leibovich, “Obama’s Partisan, Profane Confidant Reins It In,”
16
5. Kruger, “An Update on the External Ear Resonance.”
17
6. J. Vos and G. F. Smoorenburg, “Penalty for Impulse Noise, Derived from Annoyance Ratings for Impulse and Road-Traffic Sounds,”
18
1. William Wood, “The History of Skunk Defensive Secretion Research,”
19
2. Eric Block,
20
3. Rachel Herz,
21