I think the aliens encoded the message in the "Nirvana" album.
One just has to carefully sort through the digital bits in the recording of "Teen spirit" to understand the workings of the Cosmos.
Some so-called junk dna is thought to be involved in 'epigenetics' and gene regulation mechanisms. Some people have theorized that it might be
involved in controlling all sorts of different rates involved in an organisms development. Its been studied for a long time, googling around on junk
dna should prove fruitful.