Category: ScienceNews

How Myanmar’s tragic earthquake left a 500km scar on the surface of the earth in just 90 seconds. Also, more hints of a link between shingles vaccines and reduced dementia, and how earth’s first oxygen breathers seem to have evolved way before there was enough oxygen to breath.

Judith Hubbard is a seismologist and earthquake analyst who has been gleaning what scientific information we can find on the tragic quake that struck Myanmar last week.

There seems to be some sort of link between the herpes virus that causes shingles and some people’s risk of Alzheimer’s dementia. At least, the latest paper appears to confirm so, according to an analysis published in Nature this week. Pascal Geldsetzer of Stanford University and colleagues have looked at data from public health records in NHS Wales in the UK, and have retrospectively performed a “natural experiment”, finding a clear suggestion that a vaccine against the virus that causes shingles seems to confer a lower likelihood of developing dementia over the subsequent seven years. Quite why this happens remains moot.

And a long time ago, and for a long time, life on earth was nought but bacteria. The atmosphere was also nearly devoid of oxygen. These ancient bacteria leave scant fossil records, whilst the rocks show a clear time – known as the Great Oxidation Event – when earth’s atmosphere transformed to something more like the oxygen rich air we breath now. A pervading chicken-and-egg question asks whether the atmosphere changed and life adapted, or did life somehow evolve and transform the atmosphere? A team publishing in Science this week have performed an innovative analysis of bacterial genomes that suggests that the ability to use oxygen in respiration evolved some 900 million years before the atmosphere transformed. The question still stands, but as the team explain, the new analysis provides at least a clear timeline for why we breath the way we do today.

Presenter: Roland Pease Producer: Alex Mansfield Production Coordinator: Josie Hardy

(Image: People ride a scooter past the rubble of damaged Buddhist pagoda in Mandalay on April 3, 2025. Credit: Sai Aung MAIN / AFP via Getty Images)

Each year, the United States has about 1,200 tornadoes. Many of them happen in tornado alley, a very broad swath of the U.S. that shifts seasonally. This area gets at least ten times more tornadoes than the rest of the world. Science writer Sushmita Pathak says that huge difference can be chalked up to one word: geography. But there's a slice of South America with similar geographical features that gets comparatively fewer tornadoes, so what gives? Sushmita wades into the research weeds with guest host Berly McCoy, one of Short Wave's producers.

Read Sushmita's full article on tornadoes that she wrote for the publication Eos.

Have other science weather stories you think we should cover on the show? Let us know by emailing shortwave@npr.org!

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Let’s cut to the chase: “The overwhelming majority of murders in the United States involve guns,” says economist Jens Ludwig. “And in fact, most of the difference in overall murder rates between the United States and other countries are due to murders with guns.”

This may seem intuitively obvious to outside observers, but studying guns within the United States has long been a fraught endeavor, and the amount of research isn’t commensurate with the impact on U.S. society. That said, Ludwig has taken on exploring the roots of American gun violence, work that serves as grist for the Crime Lab he directs at the University of Chicago and for many of his books, including his latest, Unforgiving Places: The Unexpected Origins of American Gun Violence. What’s he’s found is that the folk wisdom around gun violence doesn’t rally hold up to the evidence.

In this Social Science Bites episode, he explains to interviewer David Edmonds how – using insights about ‘system one’ and system two’ thinking developed by Daniel Kahneman – cognition in individuals has more explanatory power than traditional variables like poverty, education and environment.

“I think system one plays an underappreciated role in all interpersonal violence, all of the issues, and this way of seeing what is driving violent behavior among people is equally true for knife violence in the UK and on and on,” Ludwig says. “So I think this is really a universal thing about people's behavior. This sort of frame on the problem helps make sense of a bunch of patterns in the data.”

Ludwig is the Edwin A. and Betty L. Bergman Distinguished Service Professor at the University of Chicago, Pritzker Director of the Crime Lab and codirector of the Education Lab at that campus, and codirector of the National Bureau of Economic Research’s working group on the economics of crime.

He and his labs are routinely recognized for their work. The Crime Lab in 2014, for example, received a MacArthur Award for Creative and Effective Institutions, while eight years earlier Ludwig himself was awarded the Association for Public Policy Analysis and Management’s David N. Kershaw Prize for Contributions to Public Policy by Age 40. Some of the books he’s co-authored or co-edited include 2000’s Gun Violence: The Real Costs, 2003’s Evaluating Gun Policy, and 2012’s Controlling Crime: Strategies and Tradeoffs.

Most iguanas are indigenous to the Americas. So how did the Fijian species end up on the island, nearly 5000 miles away in the South Pacific? According to a new study in the journal PNAS, it was probably via raft ... that is, on clump of floating trees.

And this rafting hypothesis isn't entirely unprecedented. After hurricanes Luis and Marilyn hit the Caribbean in the 1990s, researchers found that a group of iguanas had floated over 180 miles away from Guadeloupe to the territory of Anguilla.

Want to hear more about iguanas? Or rafts? Or evolutionary biology? Email us at shortwave@npr.org.

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The Trump administration is waging a ‘wholesale assault on U.S. science’ that threatens the country’s health, economic development, national security and scientific preeminence. That's according to an open letter published by nearly 2,000 doctors, scientists and researchers. William Brangham discussed the letter with Dr. Steven Woolf, one of its authors. PBS News is supported by - https://www.pbs.org/newshour/about/funders

It seems like artificial intelligence is everywhere in our virtual lives. It's in our search results and our phones. But what happens when AI moves out of the chat and into the real world? NPR science editor and correspondent Geoff Brumfiel took a trip to the Intelligence through Robotic Interaction at Scale Lab at Stanford University to see how scientists are using AI to power robots and the large hurdles that exist for them to perform even simple tasks.

Read Geoff's full story.

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Host Anand Jagatia tackles gravity - a fundamental force of the universe yet also an everyday mystery that has baffled several listeners. Can you outrun it? Or at least use it to get fitter? If it varies, does that mean that you weigh less, depending on where on earth you stand? And if it’s the force of attraction between any objects with mass, are you technically more attractive after eating a massive cake?

Professor Claudia de Rham from Imperial College London explains the basics of gravity, while we discover the best place on earth to weight ourselves, with Professor Paddy Regan from Surrey University and NPL Fellow in Nuclear and Radiation Science and Metrology.

Anand takes a very fast spin on a special chair to experience extra gravity, thanks to Professor Floris Wuyts from the University of Antwerp, Kings College London and Minister of Science of Asgardia.

And finally, we talk to an expert lined up at the other end of a hypothetical hole through the earth: Professor Richard Easther from the University of Auckland, New Zealand. What would happen if we fell straight through the earth?

CrowdScience finds gravity a force to be reckoned with.

Presenter: Anand Jagatia Producer: Marnie Chesterton Editor: Cathy Edwards Production Co-ordinator: Ishmael Soriano and Jana Bennett-Holesworth Studio Manager: Jackie Margerum and Duncan Hannant Photo: Anand Jagatia experiencing extra g-force

April 1st is notorious across the globe. Renowned for being a day of practical jokes. And it’s no different here on the BBC World Service.

Mischievous elephants, the secret to fool's gold and one of the biggest scientific hoaxes in scientific history.

From the Magic Circle to the Magic Lab, the psychology underpinning why we humans are so delightfully easy to trick with Professor Gustav Kuhn.

And a question sent in from one of you: if two people eat the same thing for breakfast, does the same thing come out the other end of both of them?

Prepare for a prank or two on Unexpected Elements.

Or as they say in Finland, ‘Aprillia, syö silliä, juo kuravettä päälle’, which translates to ‘April trick, eat herring, drink muddy water afterwards!’

Presenters: Caroline Steel with Camilla Mota and Phillys Mwatee Producers: Harrison Lewis, Alice Lipscombe-Southwell, William Hornbrook and Imaan Moin

What are the narwhals up to? Generally, we don't really know! They are mysterious creatures. NPR science correspondent Nell Greenfieldboyce talks about new, rare drone footage scientists captured of arctic narwhals. The video sparked new ideas for how they use their tusks.

Read Nell's full piece.

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This week, after five years of research, two newly discovered antiviral molecules have been shown to combat coronaviruses. Johan Neyts of the Rega Institute for Medical Research in Leuven outlines how he hopes the new molecule developed by his team might help us deal with emerging pandemics in the future.

But as the US halts all Covid related research, will drugs like these ever hit the shelves? Among the grants terminated this week by the National Institute for Health is a programme called AViDD, AntiViral Drug Discovery, supporting 9 independent consortia. Annette von Delft of Oxford University and Ed Griffen of the drugs discovery company MedChemica spoke to us about the overnight shut down of years of work and importance of antiviral development.

The longest ever carbon-based molecules have been discovered by the Mars Curiosity rover. Caroline Freissinet of the Laboratoire Atmosphères et Observations Spatiales talked us through the meticulous planning and geological chance that made this possible, and whether these long chain alkanes could be a clue to discovering life on mars.

Researchers at Vanderbilt University have been delving into the genetic evolution of horses to discover the mutation that’s behind their runaway metabolic success. Gianni Castiglione explains how a mutation that should have been catastrophic instead helped horses to evolve from the size of dogs to the giant athletic animals we know today.

Presenter: Roland Pease Producer: Emily Bird Production Coordinators: Jana Bennett-Holesworth and Josie Hardy

(Photo: Two tablets of Roche Pharmaceuticals' Tamiflu. Photo by Nikos Pekiaridis/NurPhoto via Getty Images)