superman

I'd also like to talk about this business about the atonement being infinite in time. Can somebody please point me to a scripture or LDS reference that says the atonement is infinite in time? Because this is the first I've heard of this. And couldn't infinite only mean endless, but not beginningless? Also, if the atonement is infinite in time, then why did Old testament people and prophets need to make burnt offerings in order to recieve a remission of their sins?