A steady flow of troubles for the long-foul Mystic

Water samples were taken one morning last month from the Mystic River in Somerville near the Amelia Earhart Dam.

David L Ryan/Globe Staff

The Mystic River serves as a stark symbol of the cleanup challenges remaining for waterways in cities nationwide.

Jacoby Ellsbury’s contract is up at the end of the season.

Dan Shaughnessy

No chance Jacoby Ellsbury is sticking with Red Sox

Ellsbury’s contract will be up at the end of the season and there is no indication that he plans to re-up for a hometown discount.

Drug to target hardest-to-kill cancer cells

A Cambridge start-up is going to test a drug it hopes will target cancer cells that survive the first salvo of treatment.

Larry Kessler, a longtime AIDS activist

At HIV refuge, new hope and old face

Longtime advocate Larry Kessler has stepped away from retirement to direct the Boston Living Center’s efforts to assist those living with HIV and AIDS.

Bayway refinery

Fracking helps revive East Coast refineries

The controversial drilling process has helped keep gas prices stable in Mass., and has put the US on track to become the world’s largest oil producer.

Lisa Lineweaver (center) was evaluating Blackstone Elementary teacher Molly Sangalang.

Pat Greenhouse/Globe Staff

Intensified evaluations carry lessons for teachers

Across Mass., administrators are carefully judging the effectiveness of more than 68,000 teachers statewide.

Joanne Massaro oversees Boston’s snow removal effort.

Public works chief in eye of the snowstorm

Joanne Massaro, Boston’s commissioner of public works, has come under fire recently for the city’s snow removal effort.

Kelsey Lima

Blizzard follow-up is milder for Boston

The region persevered through Sunday’s snow without any major accidents and with only isolated instances of power outages.

Globe Insiders

From the Archives | Photo gallery

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/02/13/BostonGlobe.com/Special/Images/pothole007-951[1].jpg Potholes in Boston

New England traffic has long negotiated the effects of our repetitive freeze-thaw cycle that leaves roads an obstacle course of potholes.