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Why can’t I wiggle my toes one at a time, like my fingers?

  • Written by Steven Lautzenheiser, Assistant Professor of Biological Anthropology, University of Tennessee
imageA baby chimp can grab a stick equally well with its fingers and its toes.Anup Shah/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.

Why can’t I wiggle my toes individually, like I can with my fingers? –...

Read more: Why can’t I wiggle my toes one at a time, like my fingers?

Putting pig organs in people is OK in the US, but growing human organs in pigs is not – why is that?

  • Written by Monika Piotrowska, Associate Professor of Philosophy, University at Albany, State University of New York
imageWhile research on human-pig chimeras is on an indefinite pause, xenotransplantation is moving ahead.wildpixel/iStock via Getty Images Plus

In a Maryland operating room one day in November 2025, doctors made medical history by transplanting a genetically modified pig kidney into a living patient. The kidney had been engineered to mimic human tissue...

Read more: Putting pig organs in people is OK in the US, but growing human organs in pigs is not – why is that?

From evil to upheaval and beyond: How the ‘axis’ metaphor shaped modern geopolitics

  • Written by Andrew Latham, Professor of Political Science, Macalester College
imageThe world spins on its axis.iStock/Getty Images Plus

The plural of “axis” is “axes,” apparently. And foreign policy types with axes to grind have been making good use of this other meaning, too.

Earlier this year, academic Walter Russell Mead warned in his Wall Street Journal column of the threat from the “axis of...

Read more: From evil to upheaval and beyond: How the ‘axis’ metaphor shaped modern geopolitics

Supreme Court’s decision on birthright citizenship will depend on its interpretation of one key phrase

  • Written by Morgan Marietta, Professor of American Civics, University of Tennessee
imageWhen the justices weigh the arguments, they will focus on the meaning of the first sentence of the 14th Amendment, known as the citizenship clause.zimmytws/Getty Images

The Supreme Court on Dec. 5, 2025, agreed to review the long-simmering controversy over birthright citizenship. It will likely hand down a ruling next summer.

In January 2025,...

Read more: Supreme Court’s decision on birthright citizenship will depend on its interpretation of one key...

Vaccine committee votes to scrap universal hepatitis B shots for newborns despite outcry from children’s health experts

  • Written by David Higgins, Assistant Professor of Pediatrics, University of Colorado Anschutz Medical Campus
imageFor the past 34 years, the Centers for Disease Control and Prevention has recommended that all babies receive their first hepatitis B vaccine at birth. FatCamera/E+ via Getty Images

The committee advising the Centers for Disease Control and Prevention on vaccine policy voted on Dec. 5, 2025, to stop recommending that all newborns be routinely...

Read more: Vaccine committee votes to scrap universal hepatitis B shots for newborns despite outcry from...

3 states are challenging precedent against posting the Ten Commandments in public schools – cases that could land back at the Supreme Court

  • Written by Charles J. Russo, Joseph Panzer Chair in Education and Research Professor of Law, University of Dayton
imageStudents work under posters of the Ten Commandments and the Bill of Rights in a high school classroom in Kyle, Texas, on Oct. 16, 2025.AP Photo/Eric Gay

As disputes rage on over religion’s place in public schools, the Ten Commandments have become a focal point. At least a dozen states have considered proposals that would require the posting...

Read more: 3 states are challenging precedent against posting the Ten Commandments in public schools – cases...

A culinary educator and local dining expert breaks down Michelin’s debut Philly list − and gives zero stars to the inspectors

  • Written by Jonathan Deutsch, Professor of Food and Hospitality Management, Drexel University

Working in restaurants is physically, mentally and emotionally taxing and often thankless work. So it was wonderful to see so many hardworking friends in the Philadelphia dining industry recognized at the Michelin Guide’s 2025 Northeast Cities Ceremony in Philadelphia on Nov. 18, 2025.

Three Philadelphia restaurants each received a star: Prov...

Read more: A culinary educator and local dining expert breaks down Michelin’s debut Philly list − and gives...

Girls and boys solve math problems differently – with similar short-term results but different long-term outcomes

  • Written by Sarah Lubienski, Professor of Mathematics Education, Indiana University
imageMath teachers have to accommodate high school students' different approaches to problem-solving.RJ Sangosti/MediaNews Group/The Denver Post via Getty Images

Among high school students and adults, girls and women are much more likely to use traditional, step-by-step algorithms to solve basic math problems – such as lining up numbers to add,...

Read more: Girls and boys solve math problems differently – with similar short-term results but different...

2025’s words of the year reflect a year of digital disillusionment

  • Written by Roger J. Kreuz, Associate Dean and Feinstone Interdisciplinary Research Professor​, University of Memphis
imageMany of the year's winners reference the lack of meaning and certainty in our online interactions.Mininyx Doodle/iStock via Getty Images

Which terms best represent 2025?

Every year, editors for publications ranging from the Oxford English Dictionary to the Macquarie Dictionary of Australian English select a “word of the year.”

Sometimes...

Read more: 2025’s words of the year reflect a year of digital disillusionment

Buying a gift for a loved one with cancer? Here’s why you should skip the fuzzy socks and give them meals or help with laundry instead

  • Written by Ellen T. Meiser, Assistant Professor of Sociology, University of Hawaii at Hilo
imageFuzzy socks are a popular gift for people with a serious illness such as cancer.pepifoto/iStock via Getty Images Plus

The season of gifting is in full swing – a time when people scour the internet and shops of all kinds for items that appropriately symbolize their relationships with their loved ones.

Gift givers hope that their gift will...

Read more: Buying a gift for a loved one with cancer? Here’s why you should skip the fuzzy socks and give...

More Articles ...

  1. Far-right extremists have been organizing online since before the internet – and AI is their next frontier
  2. ‘Yes’ to God, but ‘no’ to church – what religious change looks like for many Latin Americans
  3. Hope and hardship have driven Syrian refugee returns – but many head back to destroyed homes, land disputes
  4. Pete Hegseth could be investigated for illegal orders by 5 different bodies – but none are likely to lead to charges
  5. Measuring Colorado’s mountains one hike at a time
  6. Tired of the same old Christmas songs? So were these countercultural carolers
  7. Meditating on the connectedness of life could help reunite a divided country – here’s how ‘interbeing’ works
  8. Down-ranking polarizing content lowers emotional temperature on social media – new research
  9. Most normal matter in the universe isn’t found in planets, stars or galaxies – an astronomer explains where it’s distributed
  10. Facing myriad global pressures, Iran intensifies outreach to African partners for critical needs
  11. People who talk with their hands seem more clear and persuasive – new research
  12. Declaration of Independence’s promises ring out today as loudly as they did for Lincoln, FDR and through 249 years of US history
  13. Everything everywhere all at once: How Zohran Mamdani campaigned both online and with a ground game
  14. The housing crisis is forcing Americans to choose between affordability and safety
  15. FDA claims on COVID-19 vaccine safety are unsupported by reliable data – and could severely hinder vaccine access
  16. The marketing genius of Spotify Wrapped
  17. Lasting peace in Ukraine may hinge on independent monitors – yet Trump’s 28-point plan barely mentions them
  18. A hard year for federal workers offers a real-time lesson in resilience
  19. Why one 16th-century theologian’s advice for a bitterly divided nation holds true today
  20. What are small modular reactors, a new type of nuclear power plant sought to feed AI’s energy demand?
  21. Google’s proposed data center in orbit will face issues with space debris in an already crowded orbit
  22. Yes, the government can track your location – but usually not by spying on you directly
  23. Federal funding cuts are only one problem facing America’s colleges and universities
  24. Labeling dissent as terrorism: New US domestic terrorism priorities raise constitutional alarms
  25. Empathy and reasoning aren’t rivals – new research shows they work together to drive people to help more
  26. Flat Earth, spirits and conspiracy theories – experience can shape even extraordinary beliefs
  27. Planning life after high school isn’t easy – 4 tips to help students and families navigate the process
  28. Why do family companies even exist? They know how to ‘win without fighting’
  29. Larry Summers’ sexism is jeopardizing his power and privilege, but the entire economics profession hinders progress for women
  30. Sugar starts corroding your teeth within seconds – here’s how to protect your pearly whites from decay
  31. Google plans to power a new data center with fossil fuels, yet release almost no emissions – here’s how its carbon capture tech works
  32. High-speed rail moves millions throughout the world every day – but in the US, high cost and low use make its future bumpy
  33. Ranked choice voting outperforms the winner-take-all system used to elect nearly every US politician
  34. Why protecting Colorado children from dying of domestic violence is such a hard problem
  35. We are hardwired to sing − and it’s good for us, too
  36. Winter storms blanket the East, while the U.S. West is wondering: Where’s the snow?
  37. Winter storms blanket the East, while the US West is wondering: Where’s the snow?
  38. Stalin’s postwar terror targeted Soviet Jews – in the name of ‘anti-cosmopolitanism’
  39. Rural high school students are more likely than city kids to get their diplomas, but they remain less likely to go to college
  40. Texas cities have some of the highest preterm birth rates in the US, highlighting maternal health crisis nationwide
  41. New York’s wealthy warn of a tax exodus after Mamdani’s win – but the data says otherwise
  42. Why do people get headaches and migraines? A child neurologist explains the science of head pain and how to treat it
  43. When the world’s largest battery power plant caught fire, toxic metals rained down – wetlands captured the fallout
  44. Speaker Johnson’s choice to lead by following the president goes against 200 years of House speakers building up the office’s power
  45. Iran’s president calls for moving its drought-stricken capital amid a worsening water crisis – how Tehran got into water bankruptcy
  46. Guinea-Bissau’s military takeover highlights the nation’s sorry history of coups and a deepening crisis across the region
  47. Drones, physics and rats: Studies show how the people of Rapa Nui made and moved the giant statues – and what caused the island’s deforestation
  48. As US hunger rises, Trump administration’s ‘efficiency’ goals cause massive food waste
  49. A year on, the Israeli-Lebanese ceasefire looks increasingly fragile − could a return to cyclical violence come next?
  50. How does Narcan work? Mapping how it reverses opioid overdose can provide a molecular blueprint for more effective drugs