Some evolutionists used to argue that junk DNA was proof that our genome had been constructed sloppily - and is the result of undirected, inefficient processes.
The fact of the matter is that this junk (non-coding) DNA has quite a bit of purpose...
"Since the discovery of DNA's double helical structure more than a half century ago, scientists have focused much of their attention on understanding the 2 percent of the genome that is made up of classic genes, which code for the production of proteins.
However, the instructions for turning these genes on or off are generally not in the genes themselves. Rather, they are buried in the 98 percent of the genome that was once cast aside as little more than genetic "junk."