If you have had an NT Introduction class, you have probably heard of p52, the oldest known fragment of the NT. But do you know what is the oldest known fragment of the LXX? Check out Greek Papyrus 458 of the John Rylands Library. It's from the 2nd century BCE and contains portions of Deuteronomy 23-28.
Being able to view high resolution digital images of things like this is one of the absolute coolest things about the internet.