Scientist’s death halts unique research at UMass

The circumstances of Lynn Margulis’s career and death provide a window on just how difficult the passing of a working scientist can be for a research university.

Scott Brown to release six years of tax returns

US Senator Scott Brown’s campaign announced the plans today, challenging Elizabeth Warren to do the same.

President Obama spoke at the Holocaust Museum in Washington on Monday, but the president has visited New Hampshire twice in the last five months. Mitt Romney campaigned in Pennsylvania on Monday, but the former Massachusetts governor will be in New Hampshire on Tuesday for a speech and victory party.

N.H. could be decisive battleground

President Obama and Mitt Romney are fiercely pursuing the hearts and minds of the state’s notoriously finicky electorate.

Newt Gingrich hints at end of candidacy

The former House speaker said he would “reassess” his candidacy based on the results of today’s Delaware’s primary, a state where he campaigned heavily.

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Cape DA: Remains identified as Trudie Hall

District Attorney Michael O’Keefe said today that a pregnant Hall, who went missing in 2010, was shot multiple times.

Barry Chin/Globe Staff

Language is no barrier for the Bruins

The Bruins have a multinational roster of players who speak nine languages, led by captain Zdeno Chara, who is fluent in six -- and learning Italian.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2012/04/24/BostonGlobe.com/Business/Images/jacobs-friendly's-2--90x90.jpg Friendly’s CEO goes from panini to patty melts

Hired away from Panera Bread Co., Weymouth native John Maguire hopes to revive the recipe that made the ice cream parlors such a successful chain once upon a time.

G Force

Temple Grandin on autism and animals

Grandin, a professor of animal science at Colorado State University, is the subject of a new children’s book by Sy Montgomery.

A child from the Yi ethnic minority smokes a cigarette in Sichuan, China.

farah stockman

Philip Morris focuses on the global market

The US cigarette maker, seeing its domestic market decline, is emphasizing increased sales overseas, and is using lawsuits in foreign countries to protect its business.

Medford housing chief faces scrutiny over hirings

Robert Covelle allegedly demoted an employee to create a $53,000-a-year job for his bocce teammate, and hired his son’s girlfriend to decorate an office.

Metro

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Roxbury school gets arts boost

The Orchard Gardens K-8 pilot school in Roxbury has been selected to take part in a federal initiative designed to help turn around schools through the arts.

Business

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Mass. home sales rise, but prices fall in March

Year-over-year single-family home sales rose nearly 20 percent, but median prices fell for the sixth straight month, the Warren Group reported.

Sports

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Red Sox Notebook

Mike Aviles advanced safely to third on a hit by Dustin Pedroia in the first inning.

Bobby Valentine, Mike Aviles deny report of incident

On Sunday, a New York tabloid reported that there was a “very ugly scene’’ between the Red Sox shortstop and manager during spring training.

Lifestyle

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G Force

A voice that inspires

Justin Hines, a Canadian singer-songwriter who has a top-30 hit on the Billboard charts, is considered a role model for others with disabilities.