(Codex Sinaiticus via Wikipedia)
The Codex Sinaiticus is one of the oldest collection of manuscripts of Bible books extant. It includes copies of all of the New Testament books and a number of Old Testament and Apocrypha books. Since it was put on-line, it was made accessible for all Biblical scholars to study the important early manuscripts for themselves.
When the Codex Sinaiticus was put online, the media trotted out all sorts of ‘experts’ regarding the origins of the New Testament using the Codex ‘coming out party’ as an excuse to talk about the latest ‘Bart Ehrman’ type theories. All of which question the authority and early development of the Christian scriptures.
Here’s a good summary article about the Codex addressing some these ‘media driven’ issues from the Stand to Reason blog: