Authorities are searching for a suspect in the killing of Nuno F.G. Loureiro, a prominent physics professor at the Massachusetts Institute of Technology, who was shot at his home near Boston. The 47-year-old professor from Portugal was shot Monday night and died Tuesday at a local hospital.

Authorities have not provided any details about a possible motive in the killing or any other details. No suspects were in custody as of Wednesday morning, the Norfolk District Attorney’s Office said.

The shooting in Brookline, Massachusetts, took place just days after a deadly shooting at another prestigious school in the region, Brown University, where police are searching for a gunman who killed two students and injured nine others. The FBI says it knows of no connection between the crimes.

This undated photo provided by the Massachusetts Institute of Technology in December 2025 shows Nuno Loureiro. (Jake Belcher/MIT via AP)

Finding solutions to the world’s problems

Loureiro joined MIT in 2016 and was named to lead the school’s Plasma Science and Fusion Center last year, where he aimed to advance clean energy technology and other research. The center, one of the school’s largest labs, had more than 250 people working across seven buildings when he took the helm.

Loureiro, who was married, grew up in Viseu in central Portugal and studied in Lisbon before earning a doctorate in London, according to MIT. He was a researcher at an institute for nuclear fusion in Lisbon before joining MIT, it said. He studied the behavior of plasma and worked to uncover the physics behind astronomical phenomena like solar flares. His work, according to his obituary in the MIT News, “involved the design of fusion devices that could harness the energy of fusing plasmas, bringing the dream of clean, near-limitless fusion power closer to reality.”

“It’s not hyperbole to say MIT is where you go to find solutions to humanity’s biggest problems,” Loureiro said when he was named to lead the plasma science lab last year. “Fusion energy will change the course of human history.”

A notice encouraging neighbors of Massachusetts Institute of Technology professor Nuno F.G. Loureiro to display candles in their windows to honor his life is taped to an apartment door in Brookline, Mass., Tuesday, Dec. 16, 2025. (AP Photo/Leah Willingham)

Sadness and shock over Loureiro’s death

“He shone a bright light as a mentor, friend, teacher, colleague and leader, and was universally admired for his articulate, compassionate manner,” Dennis Whyte, an engineering professor who previously led MIT’s Plasma Science and Fusion Center, told a campus publication.

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Deepto Chakrabarty, the William A. M. Burden professor in astrophysics and head of the Department of Physics, described him as a “champion for plasma physics within the Physics Department, a wonderful and engaging colleague, and an inspiring and caring mentor for graduate students working in plasma science.”

The president of MIT, Sally Kornbluth, said the “shocking loss for our community comes in a period of disturbing violence in many other places,”

The Portuguese president’s office also put out a condolence statement Tuesday calling his death “an irreparable loss for science and for all those with whom he worked and lived.”

Killing comes amid search for Brown shooting suspect

The investigation into the MIT professor’s killing comes as Brown University, just 50 miles (80 kilometers) away in Providence, Rhode Island, is still reeling from Saturday’s deadly shooting. With the search for the Brown University shooter in its fifth day Wednesday, authorities were asking the public to review any security or phone footage from the week before the attack in the hopes it might help investigators identify the suspect, believing he may have cased the scene ahead of time.

By JAKE COYLE, AP Film Writer

In a seismic shift for one of television’s marquee events, the Academy Awards will depart ABC and begin streaming on YouTube beginning in 2029, the Academy of Motion Pictures Arts and Sciences announced Wednesday.

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ABC will continue to broadcast the annual ceremony through 2028. That year will mark the 100th Oscars.

But starting in 2029, YouTube will retain global rights to streaming the Oscars through 2033. YouTube will effectively be the home to all things Oscars, including red-carpet coverage, the Governors Awards and the Oscar nominations announcement.

“We are thrilled to enter into a multifaceted global partnership with YouTube to be the future home of the Oscars and our year-round Academy programming,” said academy chief executive Bill Kramer and academy president Lynette Howell Taylor. “The Academy is an international organization, and this partnership will allow us to expand access to the work of the Academy to the largest worldwide audience possible — which will be beneficial for our Academy members and the film community.”

While major award shows have added streaming partnerships, the YouTube deal marks the first of the big four — the Oscars, Grammys, Emmys and Tonys — to completely jettison broadcast. It puts one of the most watched non-NFL broadcasts in the hands of Google. YouTube boasts some 2 billion viewers.

The Academy Awards will stream for free on YouTube, in addition to YouTube TV subscribers.

Financial terms were not disclosed.

“The Oscars are one of our essential cultural institutions, honoring excellence in storytelling and artistry,” said Neal Mohan, chief executive of YouTube. “Partnering with the academy to bring this celebration of art and entertainment to viewers all over the world will inspire a new generation of creativity and film lovers while staying true to the Oscars’ storied legacy.”

By GEOFF MULVIHILL

Nebraska will become the first state to implement new work requirements for some people with Medicaid health insurance under a law President Donald Trump signed last year.

Gov. Jim Pillen, a Republican, announced Wednesday that the requirement would take effect in the state May 1 and could impact about 30,000 people who have slightly higher incomes than traditional Medicaid beneficiaries.

“We’re not here to take everybody to the curb,” he said. Instead, he said, the aim is “making sure we get every able-bodied Nebraskan to be part of our community.”

The sweeping tax and policy law Trump signed in July requires states to make sure many recipients are working by 2027 but gave them the option to do it sooner.

FILE – Centers for Medicare & Medicaid Services administrator Dr. Mehmet Oz listens as President Donald Trump speaks in the Oval Office of the White House, Oct. 16, 2025, in Washington. (AP Photo/Alex Brandon, File)

Beneficiaries will have more reporting duties

The law mandates that people ages 19 to 64 who have Medicaid coverage work or perform community service at least 80 hours a month or be enrolled in school at least half-time to receive and keep coverage.

It applies only to people who receive Medicaid coverage through an expansion that covers a population with a slightly higher income limit. Forty states and the District of Columbia have opted to expand the coverage income guidelines under former President Barrack Obama’s 2010 health insurance overhaul.

Of 346,000 Nebraska residents enrolled in Medicaid as of May, about 72,000 were in the higher income expansion group.

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Some people will be exempted, including disabled veterans, pregnant women, parents and guardians of dependent children under 14 or disabled individuals, people who were recently released from incarceration, those who are homeless and people getting addiction treatment. States can also offer short-term hardships for others if they choose.

All Medicaid beneficiaries who are eligible because of the expansion will be required to submit paperwork at least every six months showing they meet the mandate.

Those who don’t would lose their coverage.

The reporting requirement is twice as frequent as it is for most people covered by Medicaid now. That change means more work for the state agencies — and for some of them, extensive and likely expensive computer program updates.

Pillen said he does not expect the state government to increase staffing to make the changes.

When and how to implement the change is likely to be on the agenda for governors and state lawmakers across the country as legislative sessions start — most of them in January.

The policy is expected to lead to lost coverage

The nonpartisan Congressional Budget Office estimates that the requirement will reduce Medicaid costs by $326 billion over a decade — and that it will result in 4.5 million people becoming uninsured each year starting in 2027. Currently, about 77 million Americans are covered by Medicaid.

Because most people covered by Medicaid who are able to work already do, it’s not expected to increase employment rates.

Mehmet Oz, the administrator of the Centers of Medicare and Medicaid Services, joined Pillen’s announcement via a video feed and said the administration believes there are jobs available across the country, and the challenge is connecting people with them.

“Most people who are able-bodied on Medicaid actually want to get a job,” Oz said.

Georgia implemented similar requirements in 2023. Far fewer people are covered than projected, in part because of the work and reporting requirements.

Arkansas tried another variation of Medicaid work requirements — later blocked by a judge — that saw 18,000 people kicked off coverage in the first seven months after it took effect in 2018.

By MARCIA DUNN

CAPE CANAVERAL, Fla. (AP) — Saturn’s giant moon Titan may not have a vast underground ocean after all.

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Titan instead may hold deep layers of ice and slush more akin to Earth’s polar seas, with pockets of melted water where life could possibly survive and even thrive, scientists reported Wednesday.

The team led by researchers at NASA’s Jet Propulsion Laboratory challenged the decade-long assumption of a buried global ocean at Titan after taking a fresh look at observations made years ago by NASA’s Cassini spacecraft around Saturn.

They stress that no one has found any signs of life at Titan, the solar system’s second largest moon spanning 3,200 miles and brimming with lakes of liquid methane on its frosty surface.

But with the latest findings suggesting a slushy, near-melting environment, “there is strong justification for continued optimism regarding the potential for extraterrestrial life,” said the University of Washington’s Baptiste Journaux, who took part in the study published in the journal Nature.

As to what form of life that might be, possibly strictly microscopic, “nature has repeatedly demonstrated far greater creativity than the most imaginative scientists,” he said in an email.

JPL’s Flavio Petricca, the lead author, said Titan’s ocean may have frozen in the past and is currently melting, or its hydrosphere might be evolving toward complete freezing.

Computer models suggest these layers of ice, slush and water extend to a depth of more than 340 miles. The outer ice shell is thought to be about 100 miles deep, covering layers of slush and pools of water that could go down another 250 miles. This water could be as warm as 68 degrees Fahrenheit.

Because Titan is tidally locked, the same side of the moon faces Saturn all the time, just like our own moon and Earth. Saturn’s gravitational pull is so intense that it deforms the moon’s surface, creating bulges as high as 30 feet when the two bodies are closest.

FILE – This image provided by NASA shows bright methane clouds drifting in the summer skies of Saturn’s moon Titan, along with dark hydrocarbon lakes and seas clustered around the north pole, as seen from the Cassini spacecraft, June 9, 2017. (NASA/JPL-Caltech/Space Science Institute via AP, File)

Through improved data processing, Petricca and his team managed to measure the timing between the peak gravitational tug and the rising of Titan’s surface. If the moon held a wet ocean, the effect would be immediate, Petricca said, but a 15-hour gap was detected, indicating an interior of slushy ice with pockets of liquid water. Computer modeling of Titan’s orientation in space supported their theory.

Sapienza University of Rome’s Luciano Iess, whose previous studies using Cassini data indicated a hidden ocean at Titan, is not convinced by the latest findings.

While “certainly intriguing and will stimulate renewed discussion … at present, the available evidence looks certainly not sufficient to exclude Titan from the family of ocean worlds,” Iess said in an email.

NASA’s planned Dragonfly mission — featuring a helicopter-type craft due to launch to Titan later this decade — is expected to provide more clarity on the moon’s innards. Journaux is part of that team.

Saturn leads the solar system’s moon inventory with 274. Jupiter’s moon Ganymede is just a little larger than Titan, with a possible underground ocean. Other suspected water worlds include Saturn’s Enceladus and Jupiter’s Europa, both of which are believed to have geysers of water erupting from their frozen crusts.

Launched in 1997, Cassini reached Saturn in 2004, orbiting the ringed planet and flying past its moons until deliberately plunging through Saturn’s atmosphere in 2017.

The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education and the Robert Wood Johnson Foundation. The AP is solely responsible for all content.