My opinion, science explains "how" religion explains "why" and "who."
I have to agree with Iceman, centuries ago, the Greek fathers of the Church like St. Basil also spoke of the 7 days as great ages. I do think it would be silly of God to create fossils and paly with light from distant galaxies to make it seem older than it is.
the links the aAvon Lady posted are very intertesting, will have to read the last one on the ag of the universe a couple of times seems heavy.