Category: ScienceNews

It's not unusual for siblings to quibble over ownership of something — a cherished toy, a coveted seat in the car — or whose fault something is. If you're Mercedes Sheen, you not only spent your childhood squabbling with your sister over your memories, you then turn it into your research career. Mercedes studies disputed memories, where it's unclear who an event happened to. It turns out these memories can tell us a lot about people — they tend to be self-aggrandizing — and how the human brain remembers things.

Check out more of NPR's series on the Science of Siblings.

Curious about more science about memories? Email us at shortwave@npr.org.

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When CrowdScience listener Israel from Papua New Guinea received a bad grade on a maths test in third grade, he looked around the class and realised that almost all the other students had received a better result. Since then, he has always wondered: why are some people better at maths than others? And Israel isn’t the only one to think about this: our listeners from all over the world describe their relationships with numbers, which run the full gamut from love to hate. So are we all in control of our own mathematical fate, or are some people just naturally bad at it? Presenter Anand Jagatia hears about studies of identical and non-identical twins showing how genetics and environment interact to shape our mathematical abilities. Our numerical abilities are not set in stone. It’s always possible to improve, and getting rid of negative feelings and anxiety around maths could be the key, says psychologist Iro Xenidou-Dervou. Some countries seem to support children’s maths skills better than others. China and Finland both rank highly in international league tables; education experts in both countries discuss whether there are any keys to a successful mathematics education. And there is something underlying our ability to do maths in the first place: our number sense. We hear what happens when this number sense does not work as intended – and what can be done about it. Contributors: Professor Yulia Kovas – Goldsmiths University of London, UK Professor Pekka Räsänen – University of Turku, Finland Assistant Professor Zhenzhen Miao – Jiangxi Normal University, China Dr Iro Xenidou-Dervou – Loughborough University, UK Professor Brian Butterworth – University College London, UK Presented by Anand Jagatia Produced by Florian Bohr Editor: Cathy Edwards Production Co-ordinator: Liz Tuohy Studio Manager: Jackie Margerum

(Photo: Boy scratching head in front of blackboard. Credit: Jose Luis Pelaez Inc/Getty Images)

The sight of horses running wild in a city leads panellist Tristan Ahtone in Helsinki to rethink how we rate horses' welfare, Chhavi Sachdev in Mumbai tells the story of the country that is cloning the Lionel Messi of horses for sport and presenter Marnie Chesterton finds out why roboticist Eakta Jain is studying horses to engineer better relationships between humans and autonomous vehicles. All that, plus the slippery record for the world's biggest snake, how the alphabet came to be and asteroid forcing scientists to reiterate 'it will not hit Earth'.

Wildlife ecologists have seen white-tailed deer expanding their range in North America over many decades. And since the early-2000s these deer have moved north into the boreal forests of western Canada. These forests are full of spruce and pine trees, sandy soil and freezing winters with lots of snow. They can be a harsh winter wonderland. And ecologists haven't known whether a warmer climate in these forests or human land development might be driving the deer north. A recent study tries to disentangle these factors – and finds that a warming climate seems to play the most significant role in the movement of deer.

Read more in the journal Global Change Biology.

Curious about more wildlife news? Email us at shortwave@npr.org.

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As bird flu is found in US farm cats fed on raw cow’s milk, chimpanzees are observed eating infected bat dung instead of vegetables. There is a constant threat of infections crossing from species to us and also from species to other species, particularly because of what we do. That is, after all, what happened to start the pandemic.

We hear about the ongoing struggles of the Chinese virologist who broke his instructions in China in order to share the first COVID genetic data.

And a strange tale of how tobacco growing might provide bat viruses a path into other species.

Presenter: Roland Pease Producer: Alex Mansfield Production co-ordinator: Jana Bennett-Holesworth

Image: Cows on an American cattle farm (Credit: Adam Davis/EPA-EFE/REX/Shutterstock)

Here's a thought experiment: You want to spend a reasonably large sum of money providing assistance to a group of people with limited means. There's a lot of ways you might do that with a lot of strings and safeguards involved, but what about just giving them money -- "get cash directly into the hands of the poor in the cheapest, most efficient way possible." You and I might prefer that, since we, of course, are reputable people and good stewards and understand our own particular needs. But what about, well, others?

Economist Tavneet Suri has done more than just think about that; her fieldwork includes handing out money across villages in two rural areas in Kenya to see what happens. Her experiments include giving out a lump sum of cash and also spreading out that same amount over time. The results she details for host David Edmonds in this Social Science Bites podcast are, to be frank, heartening, although the mechanisms of disbursement definitely affect the outcomes.

Despite the good news, the idea of a universal basic income is by no means a settled remedy for helping the poor. For one thing, Suri says, "it's super, super expensive. It’s really expensive. And so, the question is, “Is that expense worth it?” And to understand that I think we need a few more years of understanding the benefits, understanding what people do with the incomes, understanding whether this can really kickstart these households out of poverty."

And perhaps the biggest question is whether the results of fieldwork in Kenya is generalizable. "I would love to do a study that replicates this in the West," she says. "The one thing about the West that I think is worth saying that's different is you wouldn't add it on top of existing programs. The idea is you would substitute existing programs with this. And that to me is the question: if you substituted it, what would happen?"

Suri is the Louis E. Seley Professor of Applied Economics and at the Massachusetts Institute of Technology's Sloan School of Management. She is an editor at the Review of Economics and Statistics; co-chair of the Agricultural Technology Adoption Initiative at the Abdul Latif Jameel Poverty Action Lab, known as J-PAL, at MIT; co-chair of the Digital Identification and Finance Initiative at J-PAL Africa; a member of the executive committee at J-PAL; and a faculty research fellow at the National Bureau of Economic Research.

No matter what you're doing right now – sitting, standing, walking – you're moving. First, because Earth is spinning around on its axis. This rotation is the reason we have days. Second, because Earth and other planets in our solar system are orbiting the sun. That's why we have years. Third, you're moving because the sun and the rest of our solar system is orbiting the center of the Milky Way galaxy at over 500,000 miles per hour. If all of that isn't nauseating enough, everything in the entire universe is expanding outward. All the time.

But in the 1970s, astrophysicists noticed something strange about our galactic neighborhood, or Local Group. The whole clump of neighboring galaxies was being pulled off course at over one million miles per hour, towards something we couldn't see — the "Great Attractor." This Great Attractor sits in the "Zone of Avoidance," an area of space that is blocked from view by the stars and gas of the Milky Way. Today on the show, host Regina G. Barber talks to astrophysicist Jorge Moreno about this mysterious phenomenon: What it might be and what will happen when we eventually reach it.

Curious about other cosmic mysteries? Email us at shortwave@npr.org.

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Today, we're going full nerd to talk about a new board game — Catan: New Energies. The game's goal is simple: Build and develop a modern-day island without catastrophically polluting it. Although the concept mirrors the effects of climate change, those words don't actually appear in the game. NPR correspondent Nate Rott talks to Emily about the thinking behind the new game and how the developers hope it can start conversations around energy use and pollution.

Have questions or comments for us to consider for a future episode? Email us at shortwave@npr.org — we'd love to hear from you!

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Coastlines around the world are changing, causing serious problems for the many communities living near the sea, as well as vital and fragile coastal ecosystems.

In the second of a two-part special on coastal erosion, CrowdScience explores the best ways to tackle this problem. Presenter Caroline Steel visits the Caribbean island of Puerto Rico to see the various methods they use to protect their coasts.

First up: ‘riprap’ – rocks strategically placed to keep the encroaching sea at bay. The problem is, while it protects the area immediately behind the rocks, riprap can exacerbate erosion nearby.

But there are other, more nature-friendly solutions, including sand dune restoration. Caroline picks up her shovel and helps to re-plant dunes, destroyed in the past by erosion as well as sand extraction for the construction trade. The roots of these plants stabilise the dunes, while building boardwalks prevents further damage from humans.

Nature also offers the perfect offshore protection against coastal erosion: coral reefs. These are the first line of defence in absorbing the power of the ocean’s waves. Down on the beach, we see for ourselves just how effective they are. The reefs face threats, but restoration plans are afoot. We visit a nursery that grows corals to plant out on the reefs – and find out about corals’ surprising cannibalistic tendencies in the process.

Featuring: Professor Robert Mayer - Director of Vida Marina, Center for Conservation and Ecological Restoration, University of Puerto Rico Nada Nigaglioni - Biology student, University of Puerto Rico Ernesto Diaz - Caribbean Regional Manager at TetraTech Dr Stacey Williams - Executive Director, ISER Caribe

Presenter: Caroline Steel Producer: Hannah Fisher Editor: Cathy Edwards Production Co-ordinator: Liz Tuohy Studio Manager: Emma Harth

(Photo: Coast restoration measures at Ultimo Trolley Beach, Puerto Rico. Credit: BBC)

Join the Unexpected team as they journey beyond the borders of reality to ask why we believe in the illogical.

After a fraudulent psychic dupes 1.3 million Americans, panellist Camilla Mota turns to history for insight into how scientists debunk such con artists. The Unexpected library harbours secrets of paranormal experimentation and dead air live on the BBC, and panellist Phillys Mwatee reveals why our beliefs win out over hard evidence written in ink. Nevertheless, in a world rife with conspiracy and vaccine hesitancy, Melissa Kapulu from the KEMRI-Wellcome Trust Research Programme in Kilifi, Kenya, shares the fascinating scientific obstacles faced in the quest to eradicate malaria from Africa once and for all.

Also hear how a Nigerian pastor and super-star has been making Melissa's job much harder, and life on fake mars. Presenter: Alex Lathbridge, Phillys Mwatee and Camilla Mota Producer: Harrison Lewis, Alex Mansfield and Noa Dowling