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How the color of St. Patrick’s Day went from blue to green

  • Written by Bryan McGovern, Professor of History, Kennesaw State University
imageSince 1962, the Chicago River has been dyed green for St. Patrick's Day.Scott Olson/Getty Images

St. Patrick’s Day usually conjures images of partying, Catholicism, Irish nationalism and, perhaps most famously, the color green: green clothes, green shamrocks, green beer and green rivers.

So my students are often surprised when I tell them that...

Read more: How the color of St. Patrick’s Day went from blue to green

George Washington, a real estate investor and successful entrepreneur, knew the difference between running a business and running the government

  • Written by Eliga Gould, Professor of History, University of New Hampshire
imagePresident George Washington delivers his first inaugural address in April 1789 in New York City.Painting by T.H. Matteson, engraving by H.S. Sadd, via Library of Congress

During his three presidential campaigns, Donald Trump promised to run the federal government as though it were a business. True to his word, upon retaking office, Trump put tech...

Read more: George Washington, a real estate investor and successful entrepreneur, knew the difference between...

Taking a leap of faith into imaginary numbers opens new doors in the real world through complex analysis

  • Written by William Ross, Professor of Mathematics, University of Richmond
imageImaginary numbers push the boundaries of calculus and other branches of math.Hill Street Studios/DigitalVision via Getty Images

To a nonmathematician, having the letter “i” represent a number that does not quite exist and is “imaginary” can be hard to wrap your head around. If you open your mind to this way of thinking,...

Read more: Taking a leap of faith into imaginary numbers opens new doors in the real world through complex...

DEI initiatives removed from federal agencies that fund science, but scientific research continues

  • Written by Filomena Nunes, Professor of Physics, Michigan State University
imageCollaboration is key in science – DEI programs intend to foster inclusivity in the field. sanjeri/E+ via Getty Images

As soon as President Donald Trump took office on Jan. 20, 2025, he signed an executive order titled “Ending Radical and Wasteful Government DEI Programs and Preferencing.” This order called for the termination of...

Read more: DEI initiatives removed from federal agencies that fund science, but scientific research continues

The dark parallels between 1920s America and today’s political climate

  • Written by Alex Green, Lecturer in Public Policy, Harvard Kennedy School
imageIn the 1920s, some Americans' concern for a U.S. in decline led to a rise in various discriminatory policies and movements that hurt vulnerable minorities. iStock/Getty Images Plus

As promised, the second Trump administration has quickly rolled out a slew of policies and executive orders that the president says are all aimed at “Making...

Read more: The dark parallels between 1920s America and today’s political climate

The fear of deportation hangs over unauthorized workers trying to fight exploitation, but all workers in the US have rights

  • Written by Xóchitl Bada, Professor of Latin American and Latino Studies, University of Illinois Chicago
imageHandcuffed food-processing workers are escorted into a bus after an ICE raid in Morton, Miss., in 2019.AP Photo/Rogelio V. Solis

The Trump administration has repeatedly said it wants to deport as many people as possible. What that means for the estimated 8.3 million unauthorized immigrants in the American workforce is unclear.

It is also unclear...

Read more: The fear of deportation hangs over unauthorized workers trying to fight exploitation, but all...

The FACE Act was enacted to protect reproductive health clinics − here’s why its history matters today

  • Written by Micki Burdick, Assistant Professor of Women & Gender Studies, University of Delaware
imageAnti-abortion activists protest in Orlando, Fla., on April 13, 2024.Photo by Chandan Khanna/AFP via Getty Images

Soon after taking office for a second time, President Donald Trump pardoned anti-abortion activists who had blockaded and restricted access to the entrance of a reproductive health clinic in Washington, D.C., in October 2020.

These...

Read more: The FACE Act was enacted to protect reproductive health clinics − here’s why its history matters...

Ann Arbor’s sustainable energy utility aims to build the electric power grid of the future − alongside the old one

  • Written by Mike Shriberg, Professor of Practice & Engagement, School for Environment & Sustainability, University of Michigan
imageAnn Arbor, Michigan's new sustainable energy utility doesn't have to rely on old power lines. Brittany Greeson for The Washington Post via Getty Images

An experiment is underway in Ann Arbor, Michigan, that could change how communities generate and distribute power in the future.

The city, with voters’ strong support, is launching its own...

Read more: Ann Arbor’s sustainable energy utility aims to build the electric power grid of the future −...

5 ways schools have shifted in 5 years since COVID-19

  • Written by Rachel Besharat Mann, Assistant Professor in Education Studies, Wesleyan University
imageStudents sit in pop-up tents during wind ensemble class at Wenatchee High School on Feb. 26, 2021 in Wenatchee, Wash..David Ryder/Getty Images

The U.S. educational landscape has been drastically transformed since the COVID-19 pandemic shuttered school campuses five years ago.

Access to high-quality teachers and curriculum developed by teachers is...

Read more: 5 ways schools have shifted in 5 years since COVID-19

Is ranch dressing a liquid or a solid? A physicist explains

  • Written by Rae Robertson-Anderson, Professor of Physics & Biophysics, University of San Diego
imageIt pours like a liquid but maintains its shape like a solid.Jack Andersen/Stone via Getty Images

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com.

Is ranch dressing a liquid or a solid? – Gabriel, age 8, DeLand, Florida

Imagine...

Read more: Is ranch dressing a liquid or a solid? A physicist explains

More Articles ...

  1. America is becoming a nation of homebodies
  2. 5 reasons veterans are especially hard-hit by federal cuts
  3. Daylight saving time and early school start times cost billions in lost productivity and health care expenses
  4. How Trump’s $2B court battle over foreign aid could reshape executive authority
  5. Pause in aid has introduced uncertainty into Ukraine’s military planning − forever changing its war calculus
  6. NIH funding cuts will hit red states, rural areas and underserved communities the hardest
  7. ‘Pac-Man with a ponytail’ proteins regulate everything from night vision to heartbeats – studying what GRKs look like could improve an array of drugs
  8. What Amazon MGM’s creative control over the James Bond film franchise means for the future of 007
  9. Exhausted by the news? Here are 6 strategies to stay informed without getting overwhelmed − or misled by misinformation
  10. The US has pardoned insurrectionists twice before – and both times, years of violent racism followed
  11. Beyond AI regulation: How government and industry can team up to make the technology safer without hindering innovation
  12. Knocking down abandoned buildings has a lot of benefits for Detroit − but it’s costly for cities
  13. Why getting the numbers right isn’t enough for pollsters to be credible in today’s polarized climate
  14. Butterflies declined by 22% in just 2 decades across the US – there are ways you can help save them
  15. How 18F transformed government technology − and why its elimination matters
  16. Anger is a flow of emotion like water through a hose − at work, it helps to know when to turn it up or down and how to direct it
  17. DOGE threat: How government data would give an AI company extraordinary power
  18. As tuberculosis cases rise in the US and worldwide, health officials puzzle over the resurgence of a disease once in decline
  19. What’s that microplastic? Advances in machine learning are making identifying plastics in the environment more reliable
  20. Why Muslim American nonprofits are taking steps to build trust with donors during Ramadan
  21. Death by firing squad set to resume in the US – but no matter the method, all means of execution come with a troubling history
  22. Philly’s street fentanyl contains an industrial chemical called BTMPS that’s an ingredient in plastic
  23. The US energy market has its troubles, though it may not be a ‘national emergency’
  24. Carolina wildfires followed months of weather whiplash, from drought to hurricane-fueled floods and back to drought
  25. The child boss in ‘Severance’ reveals a devastating truth about work and child-rearing in the 21st century
  26. Supreme Court sides with San Francisco, requiring EPA to set specific targets in water pollution permits
  27. COVID-19 is the latest epidemic to show biomedical breakthroughs aren’t enough to eliminate a disease
  28. Learning ethics − one Marvel movie at a time
  29. USAID’s history shows decades of good work on behalf of America’s global interests, although not all its projects succeeded
  30. Influencers have trouble figuring out their tax obligations − and with good reason
  31. Trump is the kinglike president many feared when arguing over the US Constitution in 1789 – and his address to Congress showed it
  32. A potential $110B economic hit: How Trump’s tariffs could mean rising costs for families, strain for states
  33. Extreme heat silently accelerates aging on a molecular level − new research
  34. Gifts from top 50 US philanthropists rebounded to $16B in 2024 − Mike Bloomberg; Reed Hastings and Patty Quillin; and Michael and Susan Dell lead the list of biggest givers
  35. Chairman of the Joint Chiefs advises the president on use of America’s military power
  36. How the hidden epidemic of violence against nurses affects health care
  37. How Trump’s second term might affect the market and your finances
  38. Many more Denver teens have experienced homelessness than official counts show
  39. Out-of-balance bacteria is linked to multiple sclerosis − the ratio can predict severity of disease
  40. How are clouds’ shapes made? A scientist explains the different cloud types and how they help forecast weather
  41. GOP lawmakers commit to big spending cuts, putting Medicaid under a spotlight – but trimming the low-income health insurance program would be hard
  42. Who’s who at the Vatican?
  43. What is isolationism? The history and politics of an often-maligned foreign policy concept
  44. From opposing robber barons to the New Deal to desegregation to DOGE, state attorneys general have long taken on Washington
  45. America’s designs on annexing Canada have a long history − and record of political failures
  46. What is Tren de Aragua? How the Venezuelan gang started − and why US policies may only make it stronger
  47. The only ‘winner’ here is Putin: Ukraine unites in response to Trump-Zelenskyy spat and resigns itself to new reality
  48. How Trump’s compulsion to dominate sabotages dealmaking, undermines democracy and threatens global stability
  49. Making English the official US language can’t erase the fact that the US has millions of Spanish speakers and a long multilingual history
  50. As flu cases break records this year, vaccine rates are declining, particularly for children and 65+ adults