-         Where did all the key changes go?

-         Couch confessions: Average sofa has seen 311 arguments, 316 drink spills, and 286 ‘make-up’ sessions.

-          Dozens of species were assumed to be mute — until they were recorded making sounds.

-         A loving salute to NASA's Mars rover program in 'Good Night Oppy'.

-         'Words & Music' offers 15 demos Lou Reed recorded as a fledgling artist.