"...more and more science is finding that so was most of the NT."
my understanding is that the New Testament was all written in Greek.
what is leading you to believe that parts of the New Testament were written in Hebrew?
Many things. Many of the earliest writings about scripture tells us so. They especially speak of Matthew, Mark, Luke and Acts as first written in Hebrew.
There is no one that God gave His word to that wasn't a Hebrew or was raised in a Hebrew home. That would lead me to think that all of these men listened to what God told them with a mind that thought as Hebrews did.
It was decided that Hebrew was not spoken any more at the time of Christ. New discoveries say that wasn't so. The words on the burial boxes discovered are in Hebrew. If you check on scripture you find that when the Lord spoke to Paul he spoke in Hebrew.
As I make a study of the Hebrew language and the Greek language, I find that in Hebrew the words have deep meaning that is both physical and spiritual. I do not speak or understand either Greek or Hebrew, I am saying what the people who do speak those languages tell me.
As an example, we are all familiar with the Hebrew word Shalom. There is no one word in any language that tells us what this means, we learn about it by the explanation using many adjectives. I am told that many Hebrew words are like this, they have many meanings on many levels.