Quote:
Originally Posted by Chris T
True, although I'm sure you don't mean to gloss over the fact that in such calculations, certain assumptions are made because aspects of the calculation are not measurable in any sense. The speed of light, for example. There is absolutely no way, short of inventing a working TARDIS, of establishing that the speed of light has always been constant. If it has not, then an awful lot of deeply cherished theories about the age and state of the universe are worthless.
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Our assumptions on the speed of light as a constant do ring true when we us the figure in other calculations like those of electron/particle physics. So we have a fairly good idea that the figure we have now is o.k. and as for it changing over time there's no evidence that this is the case. Should evidence of the contrary appear then the date will change. However the date some religious people have bares no relation to the data gleaned.
How can that be?