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Some black holes at the centers of galaxies have a buddy − but detecting these binary pairs isn’t easy

  • Written by Marco Ajello, Professor of Physics and Astronomy, Clemson University
imageSome black holes, bound by gravity, rotate around each other, as shown in this simulated image. Simulating eXtreme Spacetimes Lensing (SXS), CC BY-SA

Every galaxy has a supermassive black hole at its center, much like every egg has a yolk. But sometimes, hens lay eggs with two yolks. In a similar way, astrophysicists like uswho study supermassive...

Read more: Some black holes at the centers of galaxies have a buddy − but detecting these binary pairs isn’t...

Long-standing American principle of birthright citizenship under attack from Trump allies

  • Written by Carol Nackenoff, Richter Professor Emerita of Political Science, Swarthmore College
imageChildren born on U.S. soil automatically have U.S. citizenship, regardless of who their parents are.RichLegg/E+ via Getty Images

As President-elect Donald J. Trump prepares to implement sweeping policy changes affecting American immigration and immigrants, one of the issues under scrutiny by his allies appears to be birthright citizenship –...

Read more: Long-standing American principle of birthright citizenship under attack from Trump allies

Avian flu virus has been found in raw milk − a reminder of how pasteurization protects health

  • Written by Kerry E. Kaylegian, Associate Research Professor of Food Science, Penn State
imagePasteurizing milk kills disease-causing pathogens that dairy cattle pick up in fields and barns.steverts, iStock /Getty Images Plus

As the H5N1 avian flu virus continues to spread in poultry flocks and dairy cattle, consumers may worry about whether the U.S. milk supply is safe to drink. According to the U.S. Food and Drug Administration, the...

Read more: Avian flu virus has been found in raw milk − a reminder of how pasteurization protects health

Can you choose to believe something, just like that?

  • Written by Mark Boespflug, Assistant Professor of Philosophy, Fort Lewis College
imageI decide, therefore I believe?duoogle/iStock via Getty Images Plus

Some years ago, I was in a lively conversation with a software developer about arguments for and against God’s existence. After discussing their merits and shortcomings, he paused – perhaps a little impatiently – and said, “You know, these arguments really...

Read more: Can you choose to believe something, just like that?

‘Lebanon wanted us gone … it was a risk to leave’ − Syrian refugees who fled Israeli bombs face hostility and uncertainty on return

  • Written by Jasmin Lilian Diab, Assistant Professor of Migration Studies; Director of the Institute for Migration Studies, Lebanese American University
imageLebanese aid workers help Syrian refugees at the Masnaa border crossing in Bekaa Valley.Sami Boudra/Middle East Images/AFP via Getty Images

The ceasefire between Israel and Hezbollah has brought a cautious sense of relief to a Lebanese population battered by a yearlong conflict, not least the more than 1 million people displaced during the escalatio...

Read more: ‘Lebanon wanted us gone … it was a risk to leave’ − Syrian refugees who fled Israeli bombs face...

Bluesky isn’t the ‘new Twitter,’ but its resemblance to the old one is drawing millions of new users

  • Written by Casey Fiesler, Associate Professor of Information Science, University of Colorado Boulder
imageBluesky is having a moment as millions of people have joined in the wake of the 2024 election.Anna Barclay/Getty Images

What would you say at Twitter’s funeral?

That’s the question my collaborators and I asked over 1,000 people on social media as part of a broader research project on Twitter migration. Responses ranged from the profane...

Read more: Bluesky isn’t the ‘new Twitter,’ but its resemblance to the old one is drawing millions of new users

How a director of national intelligence helps a president stay on top of threats from around the world

  • Written by Gregory F. Treverton, Professor of Practice in International Relations, USC Dornsife College of Letters, Arts and Sciences
imageThe director of national intelligence coordinates the work of 18 agencies that ultimately provide crucial intelligence to the president. Douglas Rissing/iStock via Getty Images Plus

In all the arguments over whether President-elect Donald Trump’s choice for director of national intelligence is fit for the job, it’s easy to lose sight of...

Read more: How a director of national intelligence helps a president stay on top of threats from around the...

Prenatal supplements largely lack the recommended amount of omega-3 fatty acids to help prevent preterm birth − new research

  • Written by Mary Scourboutakos, Family Medicine Resident and Nutrition Expert, Eastern Virginia Medical School
imageFew women of childbearing age consume adequate amounts of omega-3 fatty acids.Caroline Purser/The Image Bank via Getty Images

Most prenatal supplements lack the amount of omega-3 fatty acids that could help prevent preterm birth, meaning delivery before 37 weeks’ gestation. This is a key finding of a new study, published by my team, in the...

Read more: Prenatal supplements largely lack the recommended amount of omega-3 fatty acids to help prevent...

Supreme Court could narrow the scope of federal environmental reviews, with less consideration of how projects would contribute to climate change

  • Written by J.B. Ruhl, Professor of Law, Director, Program on Law and Innovation, and Co-director, Energy, Environment and Land Use Program, Vanderbilt University
imageNEPA reviews are a tool for informing the public about how major federal actions could affect the environment.May Lim / 500px via Getty Images

In the 1993 movie “Jurassic Park,” Dr. Ian Malcolm, a fictional math genius specializing in chaos theory, explains the “butterfly effect,” which holds that tiny actions can lead to...

Read more: Supreme Court could narrow the scope of federal environmental reviews, with less consideration of...

Water fluoridation helps prevent tooth decay – how growing opposition threatens a 70-year-old health practice

  • Written by Amal Noureldin, Clinical Professor of Cariology, Prevention and Restorative Dentistry, Texas A&M University
imageFluoride is a mineral found in water that strengthens teeth and helps prevent cavities.vitapix/E+ via Getty Images

Driving through downtown Dallas, you might see a striking banner hanging at the U-turn bridge, near the Walnut Hill exit on Central Expressway (US 75): “Stop Fluoridation!” Below it, other banners demand action and warn of...

Read more: Water fluoridation helps prevent tooth decay – how growing opposition threatens a 70-year-old...

More Articles ...

  1. Notre Dame reopens in Paris 5 years after fire – its reconstruction preserves the past and illuminates France’s modern ambitions
  2. America’s counties are less purple than they used to be
  3. AI Jesus might ‘listen’ to your confession, but it can’t absolve your sins − a scholar of Catholicism explains
  4. One’s a Hugh Grant thriller, one’s a hot-mess reality show – and both center on stereotypes about Mormon women
  5. Is masculine anxiety spurring support for Trump among Gen Z?
  6. How right-wing media is like improv theater
  7. What South Korea’s short-lived martial law says about nation’s democracy and the autocratic tendencies of President Yoon
  8. Why you should talk to people you disagree with about politics
  9. Threatening texts targeting minorities after election were vile − but they might not be illegal
  10. Rape survivors like Gisèle Pelicot are choosing to speak out, refuting the idea that they should feel shame
  11. We surveyed hundreds of vacationers to confirm this ancient wisdom: The journey matters as much as the destination
  12. New IRS funding boosted tax enforcement and improved taxpayer services during the Biden administration
  13. NEOWISE, the NASA mission that cataloged objects around Earth for over a decade, has come to an end
  14. Noam Chomsky at 96: The linguist, educator, philosopher and public thinker has had a massive intellectual and moral influence
  15. Are trans women ‘biologically male’? The answer is complicated
  16. Wildland firefighters face a big pay cut if Congress doesn’t act − that’s taking a toll on a workforce already under stress
  17. Wildland firefighters face up to $20,000 pay cut if Congress doesn’t act − that’s taking a toll on a workforce already under stress
  18. What is Hayat Tahrir al-Sham? And how did the Islamist group evolve into a key player in Syria’s civil war?
  19. Pardon who? Hunter Biden case renews ethical debate over use and limits of peculiar presidential power
  20. Do Mom and Dad really know what’s best? A psychologist explains why kids see their parents as bossier than they are
  21. Music can change how you feel about the past
  22. The apocalypse that wasn’t: AI was everywhere in 2024’s elections, but deepfakes and misinformation were only part of the picture
  23. Why sending a belated gift is not as bad as you probably think − and late is better than never
  24. Tip pressure might work in the moment, but customers are less likely to return
  25. Dozens of cyclists and pedestrians are killed each year in Philly − an injury epidemiologist explains how to better protect bike lanes, slow drivers down and reduce collisions
  26. US attorney general’s professionalism can protect Americans’ privacy, former federal judge explains
  27. Tiff Massey’s ‘7 Mile Livernois’ exhibition isn’t just about a neighborhood – it’s a tribute to Black Detroit
  28. Fossilized footprints reveal 2 extinct hominin species living side by side 1.5 million years ago
  29. 208 million Americans are classified as obese or overweight, according to new study synthesizing 132 data sources
  30. An upward spiral – how small acts of kindness and connection really can change the world, according to psychology research
  31. Why Israel and Hezbollah reached a ceasefire now − and what it means for Israel, Lebanon, Biden and Trump
  32. Is using AI tools innovation or exploitation? 3 ways to think about the ethics
  33. UN climate negotiations end on shaky geopolitical ground, but I see reasons for hope
  34. Cycling can make seniors healthier and more independent − here’s how to design bikes and networks that meet their needs
  35. Cinnamon, spice and ‘everything nice’ – why lead-tainted cinnamon products have turned up on shelves, and what questions consumers should ask
  36. Light exercise can yield significant cognitive benefits, new research shows
  37. On Bodhi Day, Buddhists commemorate Siddhartha Gautama’s enlightenment by lighting lamps to combat darkness
  38. ‘Insurrection,’ ‘equity’ and more − these are the words that trigger Trump supporters
  39. To control your spending this holiday season, stick with cash
  40. Trump’s next HUD secretary would have a lot to do to address the history of racist housing policy – and Trump’s own comments and history suggest that’s unlikely
  41. How the gladiators inspired evangelicals’ sense of persecution
  42. Taxpayers spend 22% more per patient to support Medicare Advantage – the private alternative to Medicare that promised to cost less
  43. China’s influence grows at COP29 climate talks as US leadership fades
  44. Amid lull in tit-for-tat missile exchange, Iran and Israel seek to control the online narrative
  45. Students go to hell and back in this course that looks at depictions of the damned throughout the ages
  46. Election reform was on the ballot – voters largely said ‘no’
  47. Polling in the age of Trump highlights flawed methods and filtered realities
  48. I wrote a book on the execution of the Rosenbergs for Cold War spying – and a recently declassified document has convinced me that Ethel was innocent
  49. Tiny laboratories that fit in your hand can rapidly identify pathogens using electricity
  50. Gen Z heads home: How to navigate the evolving parent-child relationship as kids become adults