Paul Terry wrote:
In message .com,
Boltar writes

Because it is correct to do so. "Boltar's evolution" would be
correct grammatically, therefore "a million years' evolution" is
also correct.

Actually its not. Years is a plural , its not in the genetive case

It is very clearly a (plural) genitive - note spelling of genitive


in that instance otherwise it would mean "a million evolution of
year"

No. The plural genitive means, in this case, "a million years of
evolution".

Literally it means "evolution of a million years".
--
Richard J.
(to e-mail me, swap uk and yon in address)