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After a month of unexplained bouts of stomach pain, an otherwise healthy 16-year-old girl arrived at the emergency department of Massachusetts General Hospital actively retching and in severe pain. A CT scan showed nothing unusual in her innards, and her urine and blood tests were normal. The same was found two weeks prior, when she had arrived at a different hospital complaining of stomach pain.

NEW YORK — Delta Air Lines is doubling down on its focus on premium travelers and courting customers who are willing to pay for extra services. The growing wealth of high-income travelers is driving demand for more premium services, according to Delta. The Atlanta-based airline during a media briefing Tuesday and during its annual Investor Day on Wednesday unveiled more details on how its strategy will evolve. In short, Delta has made a lot of money over the years catering to premium travelers and customers can expect Delta to push new amenities and levels of service in its airliners and in airport terminals that it can monetize. Over the last 15 years, Delta has added more classes of service on its airplanes beyond the typical coach class and first class or business class, including the addition of Comfort+ extra legroom seats and premium economy. “The more you pay, the more you get,” said Delta President Glen Hauenstein.

The duck-billed dinosaur Parasaurolophus is distinctive for its prominent crest, which some scientists have suggested served as a kind of resonating chamber to produce low-frequency sounds. Nobody really knows what Parasaurolophus sounded like, however. Hongjun Lin of New York University is trying to change that by constructing his own model of the dinosaur's crest and its acoustical characteristics.

A federal court yesterday ruled against parents who sued a Massachusetts school district for punishing their son who used an artificial intelligence tool to complete an assignment. Dale and Jennifer Harris sued Hingham High School officials and the School Committee and sought a preliminary injunction requiring the school to change their son's grade and expunge the incident from his disciplinary record before he needs to submit college applications.

A Michigan company is recalling more than 167,000 pounds of ground beef products because of a possible E. coli contamination, the fourth major recall tied to a food-borne illness nationally in the past five months, according to a U. S. Department of Agriculture release. Wolverine Packing Co., a Detroit establishment, is recalling approximately 167,277 pounds of ground beef products that may be contaminated with E.

An ad company’s foray into TV operating systems (OSes) illustrates a significant shift for TV hardware toward products that are increasingly focused on ad sales and tracking. With more people using web-based streaming for TV, smart TV OSes have become the most lucrative part of the TV business. OS owners accumulate valuable data on how people use their smart TVs and streaming sticks, which is helpful for OS operators as well as third parties, like companies paying for ads distributed via TV OSes.