They may shift in form and fade in and out.

WSJ: Great Scientists Don't Need Math

All of this is consistent with the phenomenon known as "fade out, " in which any tangible gains from preschool dissipate as students progress through elementary school.

WSJ: Review & Outlook: Head Start for All

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

After each of these fizzled out pundits said Facebook would be the next to fade in the social media fad.

FORBES: The Facebook Zeitgeist and Why it's a Long-Term Buy

Rogers and Canadian bank CIBC struck a deal for NFC-based mobile payments back in May, long enough ago that it was starting to fade out of the public consciousness.

ENGADGET: Rogers, CIBC may launch Suretap NFC-based payments on October 15th, require a unique SIM

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

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

Montgomerie saw his chances of overhauling US Open champion Michael Campbell in the European Tour Order of Merit this weekend fade away as his three birdies were cancelled out by a bogey and a double bogey for a second consecutive par 72.

BBC: SPORT | Golf | Wall and Olazabal lead in Cologne