S. Hughes et al., ‘The sound of symmetry: Voice as a marker of developmental instability’, Evolution and Human Behaviour,2002, vol. 23, pp. 173–178.

265

S. Hughes, F. Dispenza and G. Gallop, Ratings of voice attractiveness predict sexual behaviour and body configuration”, Evolution and Human Behaviour,2004, vol. 25, pp. 295–304.

266

S. Juan, ‘What can you learn from the sound of someone’s voice?’, The Register,6 October 2006.

267

Dr William Sharp is from the Department of Psychology at the University of Mississippi in Oxford.

268

W. Sharp, C. Sherman and A. Gross, ‘Selective mutism and anxiety: A review of the current conceptualization of the disorder’, Journal of Anxiety Disorders,2006, vol. 21, no. 4, pp. 568–579.

269

S. Juan, ‘What is selective mutism?’, The Register, 9December 2006.

270

S.Juan, ‘Why do we open our mouths to yawn properly?’, The Register,13 January 2007.

271

Dr G. Hauser is from the Histological and Embryological Institute of the University of Wien in Germany.

272

G. Hauser, A. Daponte and M. Roberts, ‘Palatal rugae’, Journal of Anatomy,1989, vol. 165, pp. 237–249.

273

Dr Jonathan Kantor is from the Department of Dermatology at the University of Pennsylvania Medical Centre in Philadelphia.

274

J. Kantor, Medical Encyclopedia: Body Lice,US National Library of Medicine and the National Institutes of Health, Bethesda, Maryland, 19 May 2005.

275

S. Juan, ‘What lies without: Life on the human body’, The Register,2 June 2006.

276

Drs N. Agarwal, A. Kriplani, A. Gupta and N. Bhatia are from the Department of Obstetrics and Gynaecology at the All India Institute of Medical Sciences in New Delhi.

277

N. Agarwal et al., ‘Management of gigantomastia complicating pregnancy. A case report’, Journal of Reproductive Medicine,2002, vol. 47, no. 10, pp. 871–874.

278

S. Juan, ‘Is it true that a woman’s breasts can grow enormously overnight?’, The Register,13 January 2006.

279

Drs J.M. Wu, A. Mamelak, R. Nussbaum and P. McElgunn are from the School of Medicine at the University of Sheffi eld.

280

J. Wu et al., ‘Botulinum toxin A in the treatment of chromhidrosis’, Dermatological Surgery,2005, vol. 31, no. 8 (pt 1), pp. 963–965.

281

Dr Stephen Amon is head of the Infant Botulism Prevention Program at the California Department of Health Sciences in Sacramento.

282

Dr A. Boer is a dermatologist in Hamburg, Germany.

283

A. Boer, ‘Patterns histopathologic of Fox-Fordyce disease’, American Journal of Dermatopathology,2004, vol. 26, no. 6, pp. 482–492.

284

M. Sims, Adam’s Navel: A Natural and Cultural History of the Human Body,Allen Lane, London, 2003, pp. 13, 28, 44.

285

S. Juan, ‘Why don’t humans moult?’, The Register, 26 June 2006.

286

M. Rogers, ‘They’ve got a hide!’, Medical Observer,(Sydney) 8 November 2002, p. 56.

287

S. Juan, ‘Was human skin really used in book binding?’, The Register,4 August 2006.

288

Dr Peter Cave is a philosopher at the Open University, City University of London.

289

P. Cave, ‘Birthday special: John Stuart Mill’, Philosophy Now(London), May-June 2006, pp. 26–29.

290

S. Juan, ‘Making rash judgment on philosopher’s death’, National Post, 7November 2006, pp. 1–2.

291

Dr Sarah-Jayne Blakemore is from the Institute of Cognitive Neuroscience at the University College in London.

292

S. Blakemore, ‘Deluding the motor system’, Consciousness and Cognition,2003, vol. 12, issue 4, pp. 647–655.

293

Dr D.S. Bennett is from the MCP Hahnemann University in Philadelphia.

294

D. Bennett, M. Bendersky and M. Lewis, ‘Facial expressivity at 4 months: A context by expression analysis’, Infancy,2002, vol. 3, no. 1, pp. 97—113.

295

Dr M. Blagrove is from the Department of Psychology at the University of Wales in Swansea.

296

M. Blagrove, S. Blakemore and B. Thayer, ‘The ability to self-tickle following Rapid Eye Movement sleep dreaming’, Consciousness and Cognition,2006, vol. 15, no. 2, pp. 285–294.

297

S. Juan, ‘What is the purpose of tickling?’, The Register,1 September 2006.

298

J. Varasdi, Myth Information,p. 218.

299

S. Juan, ‘Why do your hands turn white when you wash the dishes?’, The Register,1 September 2006.

300

Dr R. James Swanson is from the Faculty of Biological Sciences at Old Dominion University in Norfolk, Virginia.

301

Personal communication, 2 February 2006.

302

S. Juan, ‘Why do you sometimes shiver when you wee?’, The Register,1 September 2006.

303

Dr Randolph Morgan is director of the Insectarium at the Cincinnati Zoo in Ohio.

304

D. Feldman, What are Hyenas Laughing at, Anyway?G.P. Putnam, New York, 1995, p. 179.

305

New Jersey Mosquito Control Association, FAQs on Mosquitoes,Rutgers University, New Brunswick, New Jersey, 24 October 2006.

306

Dr James Logan is from the Rothamsted Research Institute in Herfordshire, UK, and Professor Jenny Mordue is from the University of Aberdeen in Scotland.