Much data, few answers in Cape Cod dolphin strandings

Vincent DeWitt for the Boston Globe

Most of the 178 stranded dolphins have been dead. Rescuing the live ones is exacting a toll that grows greater every day, while the reason for the strandings remains a mystery.

Emotional start for trial in deaths of 4

The Mattapan trial began yesterday with a preview of legal strategies and emotional arguments that drove the victims’ relatives to flee the courtroom, sobbing.

Ex-Globe reporter dies in Syria

Anthony Shadid, a prize-winning reporter whose graceful dispatches covered nearly two decades of Middle East conflict and turmoil, died yesterday.

Art Review

‘Figuring Color’ exhibit shows pigments of their imaginations

In the ICA’s sensuous antidote to winter, four artists have made works that suggest the human touch.

J.D. Pooley/Getty Images

Risking union ire, Romney slams Santorum’s labor votes

Mitt Romney is attacking Rick Santorum for his “unapologetic defense of big labor,’’ as part of a new attempt to paint his rival as beholden to a powerful Democratic ally.

Harvard’s Lin makes splash in New York

Jeremy Lin is a never-ending trending topic, the unexpected underdog who practically single-handedly brought the Knicks back from the dead.

ALEX BEAM

Netflix’s northern exposure

The streaming media provider aims to get people to turn off TVs and watch original shows like “Lilyhammer” online.

MIT president Susan Hockfield to step down

Hockfield said she felt MIT would be best served by a new leader as it embarks on a major fund-raising campaign.

“I don’t think that Jeremy Lin — if he succeeds — is the face of the New York Knicks. I think he’s the face of the NBA. He’s even the face of professional sports.”

Ronn Torossian,  chief executive and president of 5W Public Relations

Globe Insiders

Video

http://c.o0bg.com/rf/image_90x90/Boston/2011-2020/2012/01/29/BostonGlobe.com/Tools/Images/rudick_2--90x90.jpg Globe Insiders video: The Back Story

The Back Story is a new video series where Globe journalists tell the stories behind their stories. Exclusively on BostonGlobe.com, it is hosted by photographer and multimedia journalist Dina Rudick.

Metro

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Kennedy hits the campaign trail

Joseph Kennedy III’s entrance into the congressional race yesterday was met with a crush of reporters and enthusiastic supporters.

Business

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Jobless claims near 4-year low

Weekly applications for unemployment benefits fell to a seasonally adjusted 348,000, the Labor Department said. That’s the lowest level since March 2008.

Nation & World

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Politics

Political notebook

Santorum’s income in 2011 rose to $3.6m

Rick Santorum’s personal finances detail the trajectory of a politician who became a millionaire, at times by capitalizing on his Beltway connections.

Sports

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Bulls 89, Celtics 80

Chicago Bulls' Omer Asik was hit by Boston Celtics' Chris Wilcox as Kevin Garnett looked on during the first half of last night’s game.

Celtics can't hold it together

The Celtics spent last night at United Center maddening Doc Rivers with a series of spurts followed by stretches of ineptitude.

Movies

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MOVIE REVIEW

‘This Means War’ a losing battle for Reese Witherspoon

This romantic comedy mixes other movies, television action shows, sitcoms, and comic strips, and features another terrible role for the Oscar-winning actress.