Small RNAs make big splash. (Breakthrough of the Year)

Just when scientists thought they had deciphered the roles played by the cell's leading actors, a familiar performer has turned up in a stunning variety of guises. RNA, long upstaged by its more glamorous sibling, DNA, is turning out to have star qualities of its own.
#1 The Winner Small RNAs Make Big Splash For decades, RNA molecules were dismissed as little more than drones, taking orders from DNA and converting genetic information into proteins. But [...]