The merger of Newsweek magazine and The Daily Beast website, which seemed to have fallen apart three weeks ago, is back on. The deal, announced Friday by The Daily Beast, is a little like a May-December marriage:

The 77-year-old Newsweek, recently purchased for a dollar by audio pioneer Sidney Harman, gets an infusion of energy and immediacy from the 2-year-old Beast and its irrepressible editor and co-founder Tina Brown.

The Daily Beast, part of media mogul Barry Diller’s InterActive Corp., gets the gravitas, reach and stable platform of an old, though fading, media icon. Harman and Diller will co-own the new Newsweek Daily Beast Co.