Wednesday 18 April 2007, 7:00 p.m.

Royal Institution,
Royal College of Surgeons of England, 35-43 Lincoln's Inn Fields, London.

Monday 9 April 2007, 6:00 p.m.

Edinburgh Science Festival,
National Museum of Scotland, Chambers Street.

Saturday 30 September 2006, 3:00 p.m.

Garcia Street Books,
376 Garcia Street, Santa Fe, New Mexico.

Monday 2 October 2006, 7:00 p.m.

Café Scientifique at Bar Pilar
1833 14th Street NW (between S & T Streets), Washington DC.