Prions aren't all evil, might be a missing link of sorts

http://www.newscientist.com/article/mg21328524.800-prions-point-to-a-new-style-of-evolution.html

Evolution has always been a bit questionable, how can it happen so fast?    How can random events select better critters, so fast, without many big wipeouts.

The article explains a way in which DNA can "test drive" a new evolutionary feature, quickly adapting to a new environment, without changing the actual DNA.    Wearing a pair of rose colored sunglasses called Prions.

Check it out.