A woman who was killed in a three-car crash in Weston Saturday afternoon has been identified as a 43-year-old Roslindale resident, Massachusetts State Police said.

For years, Dr. Charles Czeisler has studied sleep. The chief of the division of sleep medicine at Brigham and Women’s Hospital knows that the invention of the light bulb has profoundly altered human life and biology.

But in a perspective piece published Wednesday in the journal Nature, Czeisler argues that the sleep deficiencies that have become so pervasive among adults and children may be threatened yet again by technological progress: LEDs that consume far less energy than incandescent bulbs.

The reason Czeisler is wary of LEDs, which are already in our laptops, televisions, and cellphones, is that they are projected to become even more abundant as governments retire the incandescent light bulb and shift toward more energy-efficient sources of light.

Lelisa Desisa, the men’s winner of this year’s Boston Marathon, said he will return his medal to the city as a symbol of unity with victims of the Marathon bombings.

The cemetery in Mattapan, where 14,000 veterans are buried, was the scene of a gathering to honor service members during the annual Memorial Day ceremony.

Headlining the next Boston Calling Music Festival will be indie rockers Vampire Weekend and homegrown electro pop group Passion Pit.

Tighter security imposed at the Indianapolis 500 after the Boston Marathon bombings caused bottlenecks Sunday that angered hundreds of fans who stood in line for up to two hours to enter the speedway and said some security officials largely abandoned their checks as the green flag was waved.

Massive crowds swelled outside the Indianapolis Motor Speedway entrances as security guards clad in yellow shirts set out to check every ice cooler to make sure it met new size limits and wasn’t carrying any contraband. Sheriff’s deputies stood nearby in case things got out of hand.

Fans whose coolers violated the size limits were told to lug them back to their cars, in some cases parked several blocks away in makeshift lots.

Boo Weekley was at the 13th hole during the final round of the Colonial in Fort Worth before he finally glanced at a leaderboard — and saw his name on the top.

It was at that par 3 surrounded by an often rowdy crowd that he also heard the loudest ‘‘Boo!’’ in quite some time.

Weekley hit his birdie putt from about 22 feet, then swiped his putter in the air as if guiding the ball into the cup. He thrust the club above his head when the ball dropped to get him to 14 under, where he finished Sunday for his first PGA Tour victory in five years.

In the brave new world of online TV, Amazon and Netflix tailor shows for exactly what viewers want — whether they know it or not.

To avoid crowds, opt for hiking on what some call “the wild wall,” miles upon miles of remote, unrestored sections of the Great Wall of China.

City officials and business leaders visited facilities in Bremerhaven, a place that has reduced its unemployment rate of 25 percent to 12 after it welcomed the offshore wind industry.

Are frozen yogurt entrepreneurs cashing in on the next big thing — or betting their fortunes on a fad?

The Bruins’ depth — and the Rangers’ lack of it — led to the second-round win and the Eastern Conference final.

Gabriel Gomez is expected to target blue-collar union workers, political independents, and conservative Democrats.

A friend of one of the suspects in a killing of a British soldier was arrested immediately after he gave a BBC TV interview.

Netflix is using its massive data tank in order to make programming choices. The idea of engineering shows based on our likes is kind of cool, but it’s also kind of creepy.