The last twelve Verses?
Most believers do not see these technical sections of the scriptures, most denominational teaching cover them up for the lay Christian and since the Apostle Paul warned us about not getting into these arguments it is perhaps wise!
But as one grows and starts to preach and teach we learn some knowledge that can be troubling or debatable for those who like to question the context of the Holy Scriptures and the languages that they have been written in?
On reading these twelve verses, there is a different style to them from the rest of the Gospel of Mark and early Greek transcripts do not have them but that does not mean that they should not be there!
What they reveal is unbelief amongst the Disciples to Jesus rising from the dead and this is a understood state of mind, since most fled in fear from the garden when Jesus was arrested, even one in his birthday suit!
The others is of events that are related to the forty days that Jesus spent on the Earth in Israel between His resurrection and His Ascension!
Mark 16:8-20, Mark 14:52, John 20:15, 25, Acts 1:1-11, 1 Timothy 6:4, Titus 3:9.