Go to the link and read this entire section:
Discovery No. 5: The Gospel of Mark, widely considered to be the first gospel written, may have been penned only five or 10 years after the crucifixion, not 40 years later as scholars have thought for over a century. (continued at link above)
Thanks. I went to the link and read Discovery No. 5. I agree that Mark started writing his Gospel very early, but I think he added to it from time to time and never finished it.