When We're 64

Slate's "Pensioner's Playlist" charts the 25 greatest songs about aging and mortality. From Jimmy Durante's "Young at Heart" to Willie Nelson's "September Song" to LCD Soundsystem's "Losing My Edge," it's a pretty solid collection-and you can listen to a number of the tracks on the page.The Beatles' song from which we lifted this headline, however, didn't make the cut. Sorry, Paul.