The Riddle Of Gospels

The Riddle Of Gospels
2006.12.30 0:02

I read four Gospels at age 14 or 15. I was struck by their amazing similarities. I just wondered why four people had to write the very similar things.
Now I learned all four gospels were written in at least 50 at the earliest or 110 at the latest. My first question is why Jesus's life wasn't written down right after his crucification. My second question is why there are four similar copies of the descriptions of his life. There are many speculations on these questions.