The rotation of the Earth has defined time for as long as time has been kept, but keeping up with all of Earth's little quirks by adding and subtracting an occasional leap second is getting tiring. Timekeepers could vote Thursday to rely solely on atomic clocks. 

Jerry Yang is severing all formal ties with Yahoo by resigning all positions including his seat on the board of directors.

Lessons learned from the recent Zappos hack. 

AP - "You go on board! Is that clear? Do you hear me?" the Coast Guard officer shouted as the captain of the grounded Costa Concordia sat safe in a life raft and frantic passengers struggled to escape after the ship rammed into a reef off the Tuscan coast.

AP - His wealth and taxes suddenly a campaign focus, Mitt Romney said Tuesday he pays an effective federal tax rate of about 15 percent. That's far less than if his earnings were wages rather than gains from investments and dividends, and the disclosure under pressure triggered a sharp response from the Democratic White House as well as one of his GOP presidential rivals.

AP - Searching for traction, Rick Santorum is on the attack these days — against everyone, it seems.