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The Conversation

COVID-19 variant BA.3.2 is spreading quickly across US – a doctor explains what you need to know

  • Written by Kyle B. Enfield, Associate Professor of Medicine, University of Virginia
imageThe BA.3.2 variant of SARS-COV-2, nicknamed Cicada, is gaining ground across the U.S. and globally. Grafissimo/iStock via Getty Images Plus

A variant of COVID-19 called BA.3.2, which has circulated under the radar since late 2024, is now spreading quickly across the United States.

As a pulmonary and critical care doctor, I see many patients who are...

Read more: COVID-19 variant BA.3.2 is spreading quickly across US – a doctor explains what you need to know

Ultralightweight sonar plus AI lets tiny drones navigate like bats

  • Written by Nitin Sanket, Assistant Professor of Robotics Engineering, Worcester Polytechnic Institute
imageThis small drone is using sonar, similar to bats' echolocation, to navigate through a grove of trees.Nitin Sanket

To help small aerial robots navigate in the dark and other low-visibility environments, my colleagues and I developed an ultrasound-based perception system inspired by bat echolocation.

Current robots rely heavily on camerasor light...

Read more: Ultralightweight sonar plus AI lets tiny drones navigate like bats

What Americans can learn from other civil activism movements against authoritarian regimes

  • Written by John Shattuck, Professor of Practice in Diplomacy, Fletcher School of Law & Diplomacy, Tufts University
imageThe United States, alongside other countries, has a growing pro-democracy and nonviolent civil movement.Oliver Helbig/Getty Images

On Feb. 24, The Conversation hosted a webinar titled, “What Americans can learn from other nonviolent civil activism movements.”

Executive editor and general manager Beth Daley interviewed John Shattuck,...

Read more: What Americans can learn from other civil activism movements against authoritarian regimes

War on Iran during nuclear negotiations undermines the US’s ability to talk peace around the world − and the effects won’t end when Trump leaves office

  • Written by Debak Das, Assistant Professor, University of Denver
imageOn Feb. 7, 2026, Iranian newspapers featured headlines on the resumption of nuclear talks between Iran and the United States, following their suspension after Israeli and U.S. attacks on Iran in June 2025.Fatemeh Bahrami/Anadolu via Getty Images

Operation Epic Fury – the latest round of military strikes against Iran – began when Iran...

Read more: War on Iran during nuclear negotiations undermines the US’s ability to talk peace around the world...

From ‘Project Hail Mary’ to Artemis II, spaceflight captures audiences when it centers on people because human space travel is hazardous

  • Written by Scott Solomon, Teaching Professor of BioSciences, Rice University
imageThe Artemis II crew poses during a ground systems test ahead of launch. NASA/Frank Michaux

The central premise of the blockbuster film “Project Hail Mary” is a long-shot mission with a familiar goal: Save humanity from extinction. While the details of the threat facing humanity are new to this story, moviegoers are used to bingeing on...

Read more: From ‘Project Hail Mary’ to Artemis II, spaceflight captures audiences when it centers on people...

New study measures titanium in Apollo rock to uncover Moon’s early chemistry

  • Written by Advik D. Vira, Graduate Student in Physics, Georgia Institute of Technology
imageThe Camelot crater in the Moon's Taurus-Littrow Valley is where the sample containing trivalent titanium was found.NASA/Apollo 17: AS17-145-22159

The Earth and the Moon may look very different today, but they formed under similar conditions in space. In fact, a dominant hypothesis says that the early Earth was hit by a Mars-sized object, and it was...

Read more: New study measures titanium in Apollo rock to uncover Moon’s early chemistry

How a diplomatic snub evokes the complicated US-Brazil relationship in the second Trump era

  • Written by Anthony W. Pereira, Executive Director of the Stone Center for Latin American Studies, Tulane University; King's College London
imageU.S. President Donald Trump holds a bilateral meeting with Brazil's President Luiz Inácio Lula da Silva on Oct. 26, 2025, in Kuala Lumpur, Malaysia.Andrew Harnik/Getty Images

Darren Beattie, the recently appointed U.S. State Department senior adviser for Brazil policy, had planned to attend a forum on critical minerals in São Paulo in...

Read more: How a diplomatic snub evokes the complicated US-Brazil relationship in the second Trump era

American politicians talk about persecuted Christians abroad – but here’s what happens when those Christians migrate to the US

  • Written by Candace Lukasik, Assistant Professor of Religion, Mississippi State University
imageCoptic Easter liturgy, East Brunswick, N.J., April 2017.Candace Lukasik, CC BY-SA

Two months ago, Terez Metry arrived at a Department of Homeland Security office in Nashville with her husband, a U.S. citizen, expecting a routine step in beginning her green card application. The couple had prepared documents for a Form I-130 petition and anticipated...

Read more: American politicians talk about persecuted Christians abroad – but here’s what happens when those...

Why do some people treat the Magic Kingdom and Disney adults like cultural abominations?

  • Written by Adam Kadlac, Teaching Professor of Philosophy, Wake Forest University
imagePeople railing against the phoniness of Disney World may be putting on a show of their own.Ian Langsdon/AFP via Getty Images

If you’ve ever expressed even a passing desire to visit Walt Disney World, you may have had friends who raised their eyebrows, groaned or even sneered.

The heart of their criticism isn’t just that they think Disney...

Read more: Why do some people treat the Magic Kingdom and Disney adults like cultural abominations?

Birutė Galdikas: The last of the ‘angels’ in primatology’s most extraordinary chapter

  • Written by Mireya Mayor, Director of Exploration and Science Communication, Florida International University
imageBirute Galdikas carries an orangutan named Isabel in Borneo, Indonesia. The 2011 film 'Born To Be Wild 3D' followed her work.AP Photo/Irwin Fedriansyah

Primatologist Birutė Galdikas died on March 24, 2026, and an era of science that began in the forests of Tanzania, Rwanda and Borneo studying humanity’s closest living relatives more than...

Read more: Birutė Galdikas: The last of the ‘angels’ in primatology’s most extraordinary chapter

More Articles ...

  1. Birutė Galdikas: The last of ‘Leakey’s Angels’ in primatology’s most extraordinary chapter
  2. War in the Middle East made the case for renewables – what’s happening in each country tells a harder story
  3. Cameras have quietly appeared in thousands of US cities – now, their integration with AI is sounding alarms
  4. Two verdicts in two days: How American courts are rewriting the rules for Big Tech and children
  5. I went to CPAC and found Trump supporters unhappy about Iran, Epstein files and the economy, even while the fans at the MAGA conference celebrate his immigration policies
  6. Mosquitoes carrying malaria are evolving more quickly than insecticides can kill them – researchers pinpoint how
  7. Millions are protesting – but boycotts might be key to changing government policies
  8. The long shadow of Paul Ehrlich’s ‘Population Bomb’ is evident in anti-immigration efforts today
  9. Why do basketball players miss shots they’ve made a thousand times before? Neuroscience has an answer
  10. NASA’s Artemis II mission will take an astronaut crew around the Moon – a space policy expert describes the long road to launch
  11. Vagus nerve stimulation shows promise as a way to counter Alzheimer’s disease- and age-related memory loss
  12. College students are writing with AI – but a pilot study finds they’re not simply letting it write for them
  13. Scientists may be overestimating the amount of microplastics in the environment – and the culprit is lab gloves
  14. Supreme Court’s tariff decision still leaves a ‘mess’ for companies trying to grab refunds
  15. Soaring gas prices and disrupted supply chains will ripple out to increase costs in every store and sector of the economy
  16. 2026’s historic snow drought brings worries about water, wildfires and the future in the West
  17. What the historic snow drought means for water, wildfires and the future of the West
  18. On Passover, some Sephardic Jews revisit not only the story of their ancestors, but also their Ladino language
  19. Teens are driving the demand for online abortion pills via telehealth – new research
  20. New federal student loan limits affect social work graduate students, with impacts for survivors of domestic violence in Colorado and elsewhere
  21. Food aid doesn’t make people loafers – research shows government benefits help low-income people find jobs
  22. A connection to nature fuels well-being worldwide, according to a study of 38,000 people
  23. Anthrax-causing bacteria have dwelled in soil for centuries – cycling through people, animals and earth
  24. Pittsburgh’s post-steel economy is a success – and a warning for other cities
  25. If using ChatGPT is cheating, what about ghostwriting? The old debate behind a new panic
  26. How far can Iran’s ballistic missiles reach? A defense expert explains how the missiles work, and what Iran can and can’t hit
  27. Growing up during Sri Lanka’s civil war taught me that getting along with people across divides is a virtue we can learn
  28. What an ancient devotional text means for the women of Nepal
  29. Drones paired with AI could help search-and-rescue teams find missing persons faster
  30. 60 years of fiber optics: How a carrier of light you can’t see underlies much of the modern world
  31. ‘Vas Madness’ shows the power of messaging on men’s contraceptive decisions
  32. Irrational decision or helpful evolutionary adaptation? A philosopher on the rationality wars behind ‘nudge’ policy
  33. How the National Security Council typically functions to plan and fully assess risks when presidents consider going to war
  34. Is it ‘Ih-ran’ or ‘E-ron’? Inside the politics of pronunciation
  35. Workplace relief is coming for employees with symptoms of menstruation, perimenopause and menopause in Philly
  36. The world’s great fish migrations are collapsing – that’s a problem for millions of people
  37. Psychological toll of betrayal trauma may help explain why women kept silent for decades after alleged abuse by civil rights icon Cesar Chavez
  38. Over 400 million barrels will be added to the oil market soon – what are strategic reserves and what can they do?
  39. Can you survive inside a tornado? This scientist did by accident – he’s lucky to be alive
  40. For the nearly 1 in 4 US adults with chronic pain, employers’ expectations of a healthy body can lead to shame
  41. Immigrant kids can attend school regardless of citizenship – some states are challenging this standard
  42. Trump’s ‘Venezuela solution’ to Cuba would see the island nation returned to a client state
  43. The ever-evolving Latino vote is rapidly shifting away from Trump and Republicans
  44. Why many older adults skip hard candy – how aging can change chewing and swallowing
  45. How dolphins communicate – new discoveries from a long-term study in Sarasota, Florida
  46. What Betsy Ross’ real story tells us about women’s work in the Revolution − and why it still matters 250 years later
  47. 50 years ago, Karen Quinlan’s coma sparked the movement for patients’ rights near the end of life
  48. A web of sensors: How the US spots missiles and drones from Iran
  49. In the Easter story, women are the first to proclaim the resurrection – but churches today are still divided over female preachers
  50. Overconfidence is how wars are lost − lessons from Vietnam, Afghanistan and Ukraine for the war in Iran were ignored