• The experiments into the Mpemba effect, detailed in Keith Ross’s letter, were carried out by student teachers in training, not by primary school students (24 April, p 25).
Published 2 June 2010
• The experiments into the Mpemba effect, detailed in Keith Ross’s letter, were carried out by student teachers in training, not by primary school students (24 April, p 25).
Issue no. 2763 published 5 June 2010