Comment Re:non coding != non functional (Score 1) 19
Current evidence seems to be that a lot of it actually *is* junk...or more accurately "background noise". Sometimes the only significant part is the length, so you can chop out the right piece, and sometimes even that doesn't seem to matter. (Within limits, of course.)
Actually, that would make evolution make a lot more sense. There's a high background noise level, and what evolution does is amplify the useful signal. It used to be thought that the cost of establishing one mutation in a population was so high that it couldn't be afforded except on EXTREMELY rare occasions...but that didn't match the data. Neutral drift explained a lot of that, but perhaps there's more reasons. E.g. that most of the viable mutations happen in areas outside the normal developmental path, and then occasionally one is found to be useful. But that *requires* a lot of "junk DNA".