Here's a quote from a physics link on the, "Science of Boiling an Egg."
This document is an introduction to of some of the science relevant to preparing boiled eggs. It has evolved from a letter published in the Last Word section of New Scientist magazine (04-April-98) which answered a question by Chris Finn, who asked 'Does anybody have a formula to calculate the boiling time for a soft-boiled egg, given its weight and initial temperature?'.
Source: http://newton.ex.ac.uk/teaching/CDHW/egg/; Accessed 15 Nov 2009.
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