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Why is the sky blue?

  • Written by Daniel Freedman, Dean of the College of Science, Technology, Engineering, Mathematics & Management, University of Wisconsin-Stout
imageLight at the blue end of the rainbow is scattered more efficiently than the other colors.shomos uddin/Moment 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.

Why is the sky blue? – Mariana A-E., age 11, Tucson, Arizona

Yo...

Read more: Why is the sky blue?

What’s happening on RedNote? A media scholar explains the app TikTok users are fleeing to – and the cultural moment unfolding there

  • Written by Jianqing Chen, Assistant Professor of East Asian Languages and Cultures and of Film and Media Studies, Washington University in St. Louis
imageTikTok users fleeing to the app RedNote are mingling with Chinese social media users.VCG/VCG via Getty Images

TikTok refugees fled by the millions to RedNote, a Chinese app, in response to the TikTok ban, which went into effect Jan. 19, 2025. The company shut down the app shortly before midnight on Jan. 18.

Through cat memes, shared jokes about the...

Read more: What’s happening on RedNote? A media scholar explains the app TikTok users are fleeing to – and...

Texas is already policing the Mexican border − and will play an outsize role in any Trump plan to crack down on immigration

  • Written by Dan DeBree, Associate Professor of the Practice, Texas A&M University
imageMaverick County Sheriff's Office Deputy Sgt. Aaron Horta, EMT operators and Border Patrol officers carry a body out of a canal on June 28, 2023, in Eagle Pass, Texas. Brandon Bell/Getty Images

Over the past half-decade, the state of Texas has been pushing an evolution in the administration and enforcement of immigration law. Stepping into a...

Read more: Texas is already policing the Mexican border − and will play an outsize role in any Trump plan to...

Biden helped bring science out of the lab and into the community − emphasizing research focused on solutions

  • Written by Arthur Daemmrich, Professor of Practice in the School for the Future of Innovation in Society, Arizona State University
imageBiden began his presidency in the throes of the COVID-19 pandemic.Evan Vucci/AP Photo

President Joe Biden was inaugurated in January 2021 amid a devastating pandemic, with over 24 million COVID-19 cases and more than 400,000 deaths in the U.S. recorded at that point.

Operation Warp Speed, initiated by the Trump administration in May 2020, meant an...

Read more: Biden helped bring science out of the lab and into the community − emphasizing research focused on...

China tech shrugged off Trump’s ‘trade war’ − there’s no reason it won’t do the same with new tariffs

  • Written by Yu Zhou, Professor of Economic Geography, Vassar College
imageWhen it comes to slowing down China's tech rise, tariffs won't do the trick. Costfoto/NurPhoto via Getty Images

When Donald Trump returns to the White House, he’ll be accompanied by a coterie of China hawks, all vowing to use tariffs and export bans to stop Beijing from challenging the United States’ supremacy in technology.

This...

Read more: China tech shrugged off Trump’s ‘trade war’ − there’s no reason it won’t do the same with new...

David Lynch exposed the rot at the heart of American culture

  • Written by Billy J. Stratton, Professor of English and Literary Arts, University of Denver
imageLynch, the director of 'Twin Peaks' and 'Mulholland Drive,' died in January 2024 at the age of 78.Hector Mata/AFP via Getty Images

“There’s a sort of evil out there,” says Sheriff Truman in an episode of David Lynch’s iconic TV series, “Twin Peaks.”

That line gets to the heart of the work of the filmmaker, whose...

Read more: David Lynch exposed the rot at the heart of American culture

Climate misinformation is rife on social media – and poised to get worse

  • Written by Jill Hopke, Associate Professor of Journalism, DePaul University
imageFlooding in Asheville, N.C., caused by Hurricane Helene in September 2024 sparked climate misinformation.Melissa Sue Gerrits/Getty Images

The decision by Meta, the parent company of Facebook and Instagram, to end its fact-checking program and otherwise reduce content moderation raises the question of what content on those social media platforms...

Read more: Climate misinformation is rife on social media – and poised to get worse

How do you create a workplace that people want to work in? We embedded in a company to find out

  • Written by Radostina Purvanova, Professor of Management and Organizational Leadership, Drake University

It’s been five years since the pandemic lockdowns of 2020 disrupted the traditional office workplace. For a while, it seemed COVID-19 killed the office.

Companies are now returning to the office in ever greater numbers. As professors who have researched remote work and collaboration for decades, we have our counterarguments. But there are...

Read more: How do you create a workplace that people want to work in? We embedded in a company to find out

News coverage boosts giving after disasters – Australian research team’s findings may offer lessons for Los Angeles fires

  • Written by Cassandra Chapman, Associate Professor, The University of Queensland
imagePeople who lost their possessions in the fire that swept through Altadena, Calif., look through donated shoes and clothing on Jan. 15, 2025.AP Photo/Richard Vogel

In late 2019 and early 2020, a series of devastating wildfires, known as the “black summer” bushfire disaster, left Australia reeling: More than 20% of the country’s...

Read more: News coverage boosts giving after disasters – Australian research team’s findings may offer...

How the literature of fire can help readers find hope among the ashes

  • Written by Grace Moore, Associate Professor of English, University of Otago
imageA single page from a book lies on the charred remains of a home that burned down in the 2025 Palisades fire in Los Angeles.Christina House/Los Angeles Times via Getty Images

“We are living apocalyptically.”

The philosopher Bruno Latour uttered those words in an interview discussing the 2018 California wildfires.

His comments ring all...

Read more: How the literature of fire can help readers find hope among the ashes

More Articles ...

  1. The Starbase rocket testing facility is permanently changing the landscape of southern Texas
  2. Tool of faith or digital distraction? Catholic Church offers indulgences to faithful who fast from social media
  3. Acute stress and early signs of PTSD are common in firefighters and other first responders − here’s what to watch out for
  4. Israel-Hamas deal shows limits of US influence – and the unpredictable impact of Trump
  5. How constitutional guardrails have always contained presidential ambitions
  6. MLK’s ‘beloved community’ has inspired social justice work for decades − what did he mean?
  7. Civil servants brace for a second Trump presidency
  8. How Trump could try to stay in power after his second term ends
  9. The US ambassador to the UN is tasked with doing a careful dance between Washington and the world
  10. Soaring wealth inequality has remade the map of American prosperity
  11. Joe Biden leaves a complicated legacy on the federal courts
  12. How America courted increasingly destructive wildfires − and what that means for protecting homes today
  13. Bird flu flares up again in Michigan poultry – an infectious disease expert explains the risk to humans, chickens, cows and other animals
  14. Community savings groups in Uganda are good stewards of local people’s money – and of outsiders’ funds too, research shows
  15. This course examines Israeli school division to better understand education policy – and society – in the US
  16. The Gilded Age novel that helps explain our fascination with Luigi Mangione
  17. Bezos’ Blue Origin has successfully launched its New Glenn rocket to orbit − a feat 15 years in the making
  18. White House Office of Science and Technology Policy provides in-house science advice for the president
  19. Gaza ceasefire and hostage deal: Why now and what next?
  20. Biden’s move to remove Cuba from terror list continues ‘yo-yo’ policy likely to be reversed by Trump
  21. LA fires: Harm from long-term exposure to wildfire smoke is poorly understood − and it’s a growing risk
  22. LA fires: Long-term exposure to wildfire smoke is a growing health risk, and not well understood
  23. Universities are mapping where local news outlets are still thriving − and where gaps persist
  24. A national, nonpartisan study of the Los Angeles fires could improve planning for future disasters
  25. Meta shift from fact-checking to crowdsourcing spotlights competing approaches in fight against misinformation and hate speech
  26. Joe Biden’s record on science and tech: Investments and regulation for vaccines, broadband, microchips and AI
  27. Insurance for natural disasters is failing homeowners − I don’t have the answers, but I do know the right questions to ask
  28. Kamala Harris memes questioning her cultural background highlight Americans’ contradictions with race
  29. In eyeing Greenland, Trump is echoing long-held American designs on the Arctic expanse
  30. Catholic cardinals play a key role in secular politics as well as the Catholic Church–and the importance of Pope Francis’ choice to head the church in DC
  31. Spending, regulations and DOGE: Office of Management and Budget director plays vital role helping government get stuff done
  32. This class uses museums to show law students the high art of curating ideas
  33. My beautiful ‘practicing’ Christians: As churchgoers’ numbers shrink, their social views grow more similar
  34. Rents rise faster after disasters, but a federal program can help restrain excesses
  35. How the CIA director helps the US navigate a world of spies, threats and geopolitical turbulence
  36. Terrorist groups respond to verbal attacks and slights by governments with more violence against civilians
  37. We study aging family business incumbents who refuse to let go − here’s why the 2024 race felt familiar
  38. 4 reasons why the US might want to buy Greenland – if it were for sale, which it isn’t
  39. What’s an H-1B visa? A brief history of the controversial program for skilled foreign workers
  40. Job of homeland security secretary is to adapt almost continuously to pressures from the department, the public and the world at large
  41. The power of friendship: How a letter helped create an American bestseller about antisemitism
  42. Vaccine hesitancy among pet owners is growing – a public health expert explains why that matters
  43. A brief history of presidential inaugural speeches, from George Washington to today
  44. Larry Krasner, Kensington, the scrapped Sixers arena − and other key concerns that will shape Philly politics in 2025
  45. Lightning strikes make collecting a parasitic fungus prized in traditional Chinese medicine a deadly pursuit
  46. LA fires: Why fast wildfires and those started by human activities are more destructive and harder to contain
  47. LA fires: Why fast-moving wildfires and those started by human activities are more destructive and harder to contain
  48. US secretary of state has an expansive job that could make or break peace deals and key foreign alliances
  49. When presidents would send handwritten lists of their nominees to the Senate, things were a lot different
  50. Firefighting planes are dumping ocean water on the Los Angeles fires − why using saltwater is typically a last resort