They may shift in form and fade in and out.

WSJ: Great Scientists Don't Need Math

The similarities between Worms and NiL soon fade into the background: It's out with turn-based play and in with survival of the fastest.

CNN: Technology - Open-source, networkable shooter has Linux gamers buzzing

The break in hip-hop is that point in the song where the lyrics fade out, the instrumental and the percussion takes center stage, and the B-boys, the break-boys or the break- girls would come on to the dance floor and their thing.

NPR: Getting 'The Message' from Hip-Hop Lyrics

Now a story that Rutgers hoped would fade in the rear view has come back with a national fury, and the digging out will be political and painful.

WSJ: What Was Lost at Rutgers��Jason Gay