[ndt]

"then why has it been labeled junk?"

It is labeled "Junk DNA" and that has a specific definition and is not synonymous with "junk", although admittedly it is sometimes referred to as "junk" because the author assumes (it appears incorrectly) the reader understands the meaning of "Junk DNA".

In science it is impossible to say something "can't possibly" do something. There is always the assumption that a new discovery will change things.

"Now scientists are seeing that there is some function to that part of the dna. "

Not only have they suspected that some of it does something, I personally have been involved in projects trying to figure out what some of it does and that was 6-7 years ago.

[fabian]

well, junk is a very predjudiced and inaccurate description of something that scientists are still searching for the function of.