From Perry Bebbington
Anil Ananthaswamy passes on the assumption that all parts of the universe must once have been in causal contact in order for the temperature of the universe to be as uniform as we find it today (13 December 2008, p 32). Surely it is possible that the temperature of the universe is uniform because it was all created by the same process, and as a result different parts that have never been in causal contact have not only the same temperature but also the same laws. As an analogy, my body has the same temperature as those of other human beings, not because I am in contact with them but because we were all formed by the same process.
Nuthall, Nottinghamshire, UK
