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Google will give advertisers more control over where their ads appear and improve its internal controls, as the owner of AdWords and YouTube apologized for "a number of cases where brands' ads appeared on content that was not aligned with their values."

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If you saw any people leaping over fires, grilling fragrant kebabs or holding elaborate picnics this weekend, you may have witnessed celebrations of Nowruz, the Persian New Year, which marks the start of spring across large parts of the Middle East and Central Asia.

Updated at 10:15 a.m. ET Thursday

Students throughout Boston are getting a radically different view of the world, one laminated 24-by-36-inch sheet of paper at a time.

Beginning last Thursday, Boston Public Schools administrators have been sending social studies teachers in the second, seventh and 11th grades new maps for their classrooms — depictions that more accurately portray the sizes of Earth's continents.

A green sea turtle in Thailand that drew international sympathy when it emerged that she had consumed nearly 1,000 coins thrown into her pool has died.

The turtle nicknamed Omsin, the Thai word for "piggy bank," had an hours-long emergency surgery to remove the coins earlier this month. But she never woke up from a second emergency surgery.

Being a prominent Twitter personality comes with its fair share of trolls. Trolls, as the Internet describes them, are users who bait others for their own amusement. So whenever Vann Newkirk, a writer at The Atlantic with a large following, gets a provocative clap back on his tweets about race, he usually ignores it.

A few years ago, Dr. Gregory Thomas thought he had finally found the Holy Grail of heart disease. And it was even found in a tomb.

He was studying the arteries of 3,000-year-old Egyptian mummies, and he thought this was finally it: a culture that would be free of heart disease. Heart disease couldn't be more than 3,000 years old, could it?

Man, he was disappointed.

Exercising While Pregnant Is Almost Always A Good Idea

Mar 21, 2017

Being pregnant can sometimes feel like traversing a minefield of advice: You want to do the right thing for your baby and yourself, but conflicting input from physicians, relatives, friends and even total strangers makes it difficult to know exactly what is helpful and what is potentially harmful.

A group of researchers want women to know that when it comes to exercise, there is a strong consensus of benefit for both the mother and developing fetus.

How far should scientists be allowed to go in creating things that resemble primitive human brains, hearts, and even human embryos?

That's the question being asked by a group of Harvard scientists who are doing exactly that in their labs. They're using stem cells, genetics and other new biological engineering techniques to create tissues, primitive organs and other living structures that mimic parts of the human body.

Their concern is that they and others doing this type of "synthetic biology" research might be treading into disturbing territory.

Former Irish Republican Army commander Martin McGuinness, who left violence behind to choose peace — and who eventually met Queen Elizabeth II — has died at age 66. For nearly a decade, McGuinness served as Northern Ireland's deputy first minister.

From London, NPR's Frank Langfitt reports:

"McGuinness retired from politics in January, suffering from a rare genetic disease. Today, he was lauded for his crucial role in the 1998 Good Friday Agreement which brought peace to Northern Ireland.

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