With the blog Personal Genome's new web design comes a can't-miss theme song: Jonathan Coulter's "That Spells DNA." We never thought we'd hear a song with the words "thymine," "messenger RNA," or "ribosome" in it, but there you go. Beware, though -- the song is catchy and you might find yourself humming "Each cell has a nucleus, each nucleus has chromosomes/And DNA, baby, that spells DNA" all day long.