Someone tinkered with the resurrection story in the Gospel of Mark. Material was added at least 150 years after the first writing and was recognized as not part of the original writing some 500 years ago. We don’t know who tinkered with it or why.
Author “Mark” had ended his story. Then, more was added.
Mark wrote that the two women entered the tomb. A man in a white robe told them Jesus had been there, then arose. He instructed the women to tell the disciples. But, the women fled the tomb and said nothing because they were afraid. Mark’s story ended there.
Others came along much later and wrote various additions to the story. The most common one was about how Jesus arose and appeared before the various characters in the story. It spoke of snake healing and of Jesus going to heaven and sitting to the right of God.
The added material has been so appealing it is among the most quoted. It has started branches of the faith, such as the snake handlers, all by itself. But, it was not in the original writing.
A nonbeliever or the-Bible-is-metaphor mind would conclude those who added that material had some different goal in mind than that of Mark. Those who regard the Bible as a sacred book guided by an almighty must have their own way of explaining what happened here.
Who wrote the Bible and what it means remains up for grabs.