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Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structure

  • Written by Daniel Freedman, Dean of the College of Science, Technology, Engineering, Mathematics & Management, University of Wisconsin-Stout
imageRubies get their bright color from some fascinating chemistry. Matthew Hill/Bloomberg Creative Photos via Getty Images

The colors of rubies and emeralds are so striking that they define shades of red and green – ruby red and emerald green. But have you ever wondered how they get those colors?

I am an inorganic chemist. Researchers in my field...

Read more: Why are rubies red and emeralds green? Their colors come from the same metal in their atomic...

I’m a sports psychologist and diehard Eagles fan – here’s the behavioral science behind a Super Bowl LIX win

  • Written by Eric Zillmer, Professor of Neuropsychology, Drexel University
imagePhiladelphia Eagles quarterback Jalen Hurts' innovative plays demonstrate 'brain connectivity at its finest,' the author writes.Mitchell Leff via Getty Images

The Super Bowl is one of the world’s most significant single-day sporting events.

It attracts over 100 million U.S. viewers and tens of millions of international viewers, making it an...

Read more: I’m a sports psychologist and diehard Eagles fan – here’s the behavioral science behind a Super...

I’m a sports psychologist and diehard Eagles fan - here’s the behavioral science behind a Super Bowl LIX win

  • Written by Eric Zillmer, Professor of Neuropsychology, Drexel University
imagePhiladelphia Eagles quarterback Jalen Hurts' innovative plays demonstrate 'brain connectivity at its finest,' the author writes.Mitchell Leff via Getty Images

The Super Bowl is one of the world’s most significant single-day sporting events.

It attracts over 100 million U.S. viewers and [tens of millions of international viewers], making it an...

Read more: I’m a sports psychologist and diehard Eagles fan - here’s the behavioral science behind a Super...

Musk’s inauguration salute is not the only apparent fascist signal from Trump’s administration

  • Written by Matthew Kriner, Director of Strategy, Partnerships and Intelligence at the Center on Terrorism, Extremism, and Counterterrorism, Middlebury Institute of International Studies
imageElon Musk claimed this is not a Nazi salute − but then replied to critics with Nazi-themed puns.Angela Weiss/AFP via Getty Images)

Once again, a presidential administration headed by Donald Trump is in the spotlight over allegations of hiddenfascist sympathies. This time, it’s precipitated by what one observer called a “stiff-armed...

Read more: Musk’s inauguration salute is not the only apparent fascist signal from Trump’s administration

President Trump may think he is President Jackson reincarnated − but there are lessons in Old Hickory’s resistance to sycophants

  • Written by Maurizio Valsania, Professor of American History, Università di Torino
imageA painting of President Andrew Jackson hangs in the Oval Office on the day Donald Trump was inaugurated for the second time, Jan. 20, 2025.AP Photo/Evan Vucci)

The portrait of President Andrew Jackson has recently made a comeback in the Oval Office. “Old Hickory” – Jackson’s nickname – has long been a favorite of...

Read more: President Trump may think he is President Jackson reincarnated − but there are lessons in Old...

3 ways the Trump administration could reinvest in rural America’s future

  • Written by Randolph Hubach, Professor of Public Health, Purdue University
imageRural America can be idyllic, but many communities still need support. Mint Images via Getty Images

Rural America faces many challenges that Congress and the federal government could help alleviate under the new Trump administration.

Rural hospitals and their obstetrics wards have been closing at a rapid pace, leaving rural residents traveling...

Read more: 3 ways the Trump administration could reinvest in rural America’s future

3 ways the Trump administration could reinvest in rural America’s future, starting with health care

  • Written by Randolph Hubach, Professor of Public Health, Purdue University
imageRural America can be idyllic, but many communities still need support. Mint Images via Getty Images

Rural America faces many challenges that Congress and the federal government could help alleviate under the new Trump administration.

Rural hospitals and their obstetrics wards have been closing at a rapid pace, leaving rural residents traveling...

Read more: 3 ways the Trump administration could reinvest in rural America’s future, starting with health care

Trump’s Project 2025 agenda caps decades-long resistance to 20th century progressive reform

  • Written by Colin Gordon, Professor of History, University of Iowa
imageThere has long been a tug-of-war over White House plans to make government more liberal or more conservative.Douglas Rissing/iStock / Getty Images Plus

For much of the 20th century, efforts to remake government were driven by a progressive desire to make the government work for regular Americans, including the New Deal and the Great Society...

Read more: Trump’s Project 2025 agenda caps decades-long resistance to 20th century progressive reform

Trump’s tariff threats fit a growing global phenomenon: hardball migration diplomacy

  • Written by Nicholas R. Micinski, Assistant Professor of Political Science and International Affairs, University of Maine
imageView at the entrance of the United States Embassy taken in Bogota, ColombiaPablo Vera/AFP via Getty Images

As diplomatic spats go, it was short-lived.

On Jan 26, 2025, Colombian President Gustavo Petro turned away American military planes carrying people being deported from the United States. In response, U.S. President Donald Trump threatened 25%...

Read more: Trump’s tariff threats fit a growing global phenomenon: hardball migration diplomacy

Drought can hit almost anywhere: How 5 cities that nearly ran dry got water use under control

  • Written by Sara Hughes, Adjunct Professor of Environment and Sustainability, University of Michigan
imageLas Vegas' water supplier offers rebates to residents who tear out their grass lawns to save water.LPETTET/iStock/Getty Images Plus

Water scarcity is often viewed as an issue for the arid American West, but the U.S. Northeast’s experience in 2024 shows how severe droughts can occur in just about any part of the country.

Cities in the Northeast...

Read more: Drought can hit almost anywhere: How 5 cities that nearly ran dry got water use under control

More Articles ...

  1. Fossil shark teeth are abundant and can date the past in a unique way
  2. Rare portraits reveal the humanity of the slaves who revolted on the Amistad
  3. Your environment affects how well your medications work − identifying exactly how could make medicine better
  4. Where does black fall on the color spectrum? A color scientist explains
  5. The Black librarian who rewrote the rules of power, gender and passing as white
  6. Bogus scientific papers are enriching fraudsters and slowing lifesaving medical research
  7. Property and sovereignty in space − as countries and companies take to the stars, they could run into disputes
  8. Can a charter school be religious? The Supreme Court decision about St. Isidore, a Catholic school in Oklahoma, could redraw lines around church and state in education
  9. AI gives nonprogrammers a boost in writing computer code
  10. Teens on social media: Red, blue and purple states are all passing laws to restrict and protect adolescents
  11. Nonprofits that provide shelter for homeless people, disaster recovery help, and food for low-income Americans rely heavily on federal funding – they would be reeling if Trump froze that money
  12. From breakbeats to the dance floor: How hip-hop and house revolutionized music and culture
  13. How nonprofits abroad can fill gaps when the US government cuts off foreign aid
  14. Biden targeted the online right-wing terrorism threat − now it’s up to Trump
  15. A federal policy expert weighs in on Trump’s efforts to stifle gender-affirming care for Americans under 19
  16. How satellites and AI help fight wildfires today
  17. Why Trump’s meme coin is a cash grab
  18. Stricter abortion laws may cause increased infant deaths − 2 maternal and child health researchers explain the data
  19. ‘We painted our fear, hope and dreams’ − examining the art and artists of Guantánamo Bay
  20. Gen Z seeks safety above all else as the generation grows up amid constant crisis and existential threat
  21. Philly Whole Foods store becomes first to unionize – a labor expert explains what’s next and how Trump could stall workers’ efforts
  22. Bennu asteroid reveals its contents to scientists − and clues to how the building blocks of life on Earth may have been seeded
  23. Problematic Paper Screener: Trawling for fraud in the scientific literature
  24. Why building big AIs costs billions – and how Chinese startup DeepSeek dramatically changed the calculus
  25. Fake papers are contaminating the world’s scientific literature, fueling a corrupt industry and slowing legitimate lifesaving medical research
  26. Rest, reorientation and hope – the pillars of 2025’s Catholic Jubilee year
  27. President Carter had to balance employers’ demands for foreign workers with pressure to restrict immigration – and so does Trump
  28. Skin phantoms help researchers improve wearable devices without people wearing them
  29. Almost half of evicted women and families in metro Detroit say they were illegally pushed out of their homes
  30. ‘Aliens’ and ‘animals’ – language of hate used by Trump and others can be part of a violent design
  31. Robert F. Kennedy Jr.’s nomination signals a new era of anti-intellectualism in American politics
  32. What’s behind Trump’s flurry of executive action: 4 essential reads on autocrats and authoritarianism
  33. Commerce oversees everything from weather and salmon to trade and census − here are 3 challenges awaiting new secretary
  34. ¿Trump va en serio con cambiar el nombre del Golfo de México al ‘Golfo de América’? Esto explica una geógrafa
  35. Engineering the social: Students in this course use systems thinking to help solve human rights, disease and homelessness
  36. Medical research depends on government money – even a day’s delay in the intricate funding process throws science off-kilter
  37. In asking Trump to show mercy, Bishop Budde continues a long tradition of Christian leaders ‘speaking truth to power’
  38. St. Thomas Aquinas’ skull just went on tour − here’s what the medieval saint himself would have said about its veneration
  39. Disaster evacuations can take much longer than people expect − computer simulations could help save lives and avoid chaos
  40. Global wildlife trade is an enormous market – a look at the billions of animals the US imports from nearly 30,000 species
  41. Global wildlife trade is an enormous market – the US imports billions of animals from nearly 30,000 species
  42. Donors are down, but dollars are up – how US charitable giving is changing
  43. Canada and Greenland aren’t likely to join the US anytime soon – but ‘GrAmeriCa’ is a revealing thought experiment
  44. Getting mail to your door is just one part of what the postmaster general does
  45. Nutrition advice is rife with misinformation − a medical education specialist explains how to tell valid health information from pseudoscience
  46. Happiness in poorer countries does not follow the typical U-shaped curve − people are often happiest in middle age
  47. Federal threats against local officials who don’t cooperate with immigration orders could be unconstitutional − Justice Antonin Scalia ruled against similar plans
  48. I study democracy worldwide − here’s how Texas is eroding human rights, free expression and civil liberties
  49. Why does it hurt when you get a scrape? A neuroscientist explains the science of pain
  50. How does raw water compare to tap water? A microbiologist explains why the risks outweigh the benefits