How to 3D print fully-formed robots
In this episode:
00:46 Machine vision enables multi-material 3D printing
3D printers are capable of producing complex shapes, but making functioning objects from multiple materials in a single print-run has proved challenging. To overcome this, a team has combined inkjet printing with an error-correction system guided by machine vision, to allow them to print sophisticated multi-material objects. They used this method to make a bio-inspired robotic hand that combines soft and rigid plastics to make mechanical bones, ligaments, and tendons, as well as a pump based on a mammalian heart.
Research article: Buchner et al.
News & Views: Multi-material 3D printing guided by machine vision
07:49 Research Highlights
Citizen-scientists help identify an astronomical object that blurs the line between asteroid and comet, and how a Seinfeld episode helped scientists to distinguish the brain regions involved in understanding and appreciating humour.
Research Highlight: Citizen scientists find a rarity: an asteroid trying to be a comet
Research Highlight: One brain area helps you to enjoy a joke — but another helps you to get it
10:31 Assessing the effectiveness of lifestyle interventions for diabetes
Type 2 diabetes affects hundreds of millions of people around the world and represents a significant burden on healthcare systems. But behaviour change programmes — also known as lifestyle interventions — could potentially play a large role in preventing people from developing type 2 diabetes. This week in Nature a new paper assesses how effective this kind of intervention might be. Looking at a huge amount of data from the NHS Diabetes Prevention Programme, the paper concludes that these interventions represent a viable diabetes prevention strategy.
Research article: Lemp et al.
News & Views: Diabetes prevention programme put to the test
17:35 Briefing Chat
How marine heatwaves revved up crabs’ metabolisms until they starved, and the AI-powered, robot chemist that could extract oxygen from water on Mars.
Nature News: This AI robot chemist could make oxygen on Mars
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Why are we nice? Altruism's origins are put to the test30:41In this episode:00:45 Why are humans so helpful?Humans are notable for their cooperation and display far more altruistic behaviour than other animals, but exactly why this behaviour evolved has been a puzzle. But in a new paper, the two leading theories have been put the test with a model and a real-life experiment. They find that actually neither theory on its own leads to cooperation but a combination is required for humans to help one another.Research article: Efferson et al.News and Views: Why reciprocity is common in humans but rare in other animals10:55 Research HighlightsThe discovery of an ancient stone wall hidden underwater, and the fun that apes have teasing one another.Research Highlight: Great ‘Stone Age’ wall discovered in Baltic SeaResearch Highlight: What a tease! Great apes pull hair and poke each other for fun13:14 The DVD makes a comebackOptical discs, like CDs and DVDs, are an attractive option for long-term data storage, but these discs are limited by their small capacity. Now though, a team has overcome a limitation of conventional disc writing to produce optical discs capable of storing petabits of data, significantly more than the largest available hard disk. The researchers behind the work think their new discs could one day replace the energy-hungry hard disks used in giant data centres, making long-term storage more sustainable.Research Article: Zhao et al.20:10 Briefing ChatThe famous fossil that turned out to be a fraud, and why researchers are making hybrid ‘meat-rice’.Ars Technica: It’s a fake: Mysterious 280 million-year-old fossil is mostly just black paintNature News: Introducing meat–rice: grain with added muscles beefs up proteinSubscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday.
Smoking changes your immune system, even years after quitting21:3500:45 Smoking's long-term effects on immunityIt's well-known that smoking is bad for health and it has been linked to several autoimmune disorders, but the mechanisms are not fully understood. Now, researchers have investigated the immune responses of 1,000 people. Whilst some effects disappear after quitting, impacts on the T cell response lingers long after. The team hopes that this evidence could help better understand smoking's association with autoimmune diseases.Research article: Saint-André et al.News and Views: Smoking’s lasting effect on the immune system07:03 Research HighlightsWhy explosive fulminating gold produces purple smoke, and a curious act of altruism in a male northern elephant seal.Research Highlight: Why an ancient gold-based explosive makes purple smokeResearch Highlight: ‘Altruistic’ bull elephant seal lends a helping flipper09:28 Briefing ChatAn author-based method to track down fake papers, and the new ocean lurking under the surface of one of Saturn's moons.Nature News: Fake research papers flagged by analysing authorship trendsNature News: The Solar System has a new ocean — it’s buried in a small Saturn moonSubscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday.
Why we need to rethink how we talk about cancer14:53For over a century, cancer has been classified by areas of the body - lung cancer, breast cancer, skin cancer etc. And yet modern medical research is telling us that the molecular and genetic mechanisms behind cancers are not necessarily tied to parts of the body. Many drugs developed to treat metastatic cancers have the capacity to work across many different cancers, and that presents an opportunity for more tailored and efficient treatments. Oncologists are calling for a change in the way patients, clinicians and regulators think about naming cancers.In this podcast, senior comment editor Lucy Odling-Smee speaks with Fabrice André from Institute Gustave Roussy, to ask what he thinks needs to change.Comment: Forget lung, breast or prostate cancer: why tumour naming needs to changeSubscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday.
Cancer's power harnessed — lymphoma mutations supercharge T cells35:23In this episode:0:46 Borrowing tricks from cancer could help improve immunotherapyT cell based immunotherapies have revolutionised the treatment of certain types of cancer. However these therapies — which involved taking someone’s own T cells and reprogramming them to kill cancer cells — have struggled to treat solid tumours, which put up multiple defences. To overcome these, a team has taken mutations found in cancer cells that help them thrive and put them into therapeutic T cells. Their results show these powered-up cells are more efficient at targeting solid tumours, but don’t turn cancerous themselves.Research article: Garcia et al.11:39 Research HighlightsHow researchers solved a submerged-sprinkler problem named after Richard Feynman, and what climate change is doing to high-altitude environmental records in Switzerland.Research Highlight: The mystery of Feynman’s sprinkler is solved at lastResearch Highlight: A glacier’s ‘memory’ is fading because of climate change14:28 What might the car batteries of the future look like?As electric cars become ever more popular around the world, manufacturers are looking to improve the batteries that power them. While conventional lithium-ion batteries have dominated the electric vehicle market for decades, researchers are developing alternatives that have better performance and safety — we run though some of these options and discuss their pros and cons.News Feature: The new car batteries that could power the electric vehicle revolution25:32 Briefing ChatHow a baby’s-eye view of the world helps an AI learn language, and how the recovery of sea otter populations in California slowed rates of coastal erosion.Nature News:This AI learnt language by seeing the world through a baby’s eyesNews: How do otters protect salt marshes from erosion? ShellfishlySubscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday.
Cervical cancer could be eliminated: here's how17:21Cervical cancer is both treatable and preventable, and the WHO has called for countries to come together to to eliminate the disease in the next century.However the disease still kills over 300,000 people each year, and levels of screening, treatment and vaccination need to be stepped up in order to achieve this goal.These challenges are particularly stark in low- and middle-income countries, where a lack of funding, staffing and infrastructure are obstacles. Vaccine hesitancy, especially in light of the COVID-19 pandemic, is also a key problem.In this Podcast Extra, two experts share their thoughts on how best to overcome these obstacles, and make elimination of cervical cancer a reality.Comment: Cervical cancer kills 300,000 people a year — here’s how to speed up its eliminationSubscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday.
Ancient DNA solves the mystery of who made a set of stone tools28:45In this episode:0:48 How hominins spread through EuropeAncient stone tools are often uncovered in Europe, but it can be difficult to identify who crafted them, as Neanderthals and Homo sapiens coexisted in the region for several thousand years. The makers of one type of tool found in northern Europe has long puzzled researchers, but now through genetic analysis of nearby skeletal fragments, it has been revealed that they were made by Homo sapiens. The age of these tools suggests that modern humans were more widespread and adaptable to living in colder climates than previously thought.Research article: Mylopotamitaki et al.News and Views: Stone tools in northern Europe made by Homo sapiens 45,000 years ago09:36 Research HighlightsHow a Colombian mountain range lost its root, and what Roman wine may have looked, smelled and tasted like.Research Highlight: A mysterious mountain range lacks roots but still stands tallResearch Highlight: The clever system that gave Roman wines an amber colour and nutty aroma15:21 Briefing ChatAnalysis of lab-grown neurons reveals why brain cells grow so slowly in humans, and a genetic therapy for a certain type of deafness shows promise.Video: Why human brain cells grow so slowly Science: Gene therapies that let deaf children hear bring hope—and many questionsSubscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday.
Audio long read: Long COVID is a double curse in low-income nations — here’s why12:23Evidence so far suggests that the prevalence of long COVID in low- and middle-income countries could be similar to that of wealthier countries. For example, by some estimates, more than four million people in Brazil have long COVID.However, an absence of research on the condition in less-wealthy countries has left advocates hamstrung: few physicians acknowledge that long COVID exists. A lack of data is also hampering efforts to search for the mechanisms of the condition and tailor treatments.This is an audio version of our Feature Long COVID is a double curse in low-income nations — here’s why
Toxic red mud could be turned into 'green' steel24:30In this episode:0:46 Turning a toxic by-product into ironRed mud is a toxic by-product of aluminium manufacture, and millions of tonnes of it is produced each year. The majority ends up in landfills, pumped into vast lakes or stored in dried mounds, posing a serious environmental risk. This week, researchers demonstrate how red mud can be reused to make iron, a vital component in the production of steel. As their method uses hydrogen plasma rather than fossil fuels, they suggest it could be a way to reduce the carbon emissions associated with the steelmaking industry.Research article: Jovičević-Klug et al.News and Views: Iron extracted from hazardous waste of aluminium production09:36 Research HighlightsThe economics of next-generation geothermal power plants, and the folded-fabric robot that crawls like a snake.Research Highlight: Flexible geothermal power makes it easier to harness Earth’s inner heatResearch Highlight: Origami fabric robot slithers like a snake20:53 Briefing ChatA computational model that predicts a person's likelihood of developing long COVID, NASA finally crack open the lid of OSIRIS-REx’s sample container, and how the ‘Moon Sniper’ craft pulled off the most precise lunar landing ever.Nature News: Long-COVID signatures identified in huge analysis of blood proteinJohnson Space Centre: NASA’S OSIRIS-REx Curation Team Reveals Remaining Asteroid SampleNature News: Japan’s successful Moon landing was the most precise everSubscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday.
This AI just figured out geometry — is this a step towards artificial reasoning?32:24In this episode:0:55 The AI that deduces solutions to complex maths problemsResearchers at Google Deepmind have developed an AI that can solve International Mathematical Olympiad-level geometry problems, something previous AIs have struggled with. They provided the system with a huge number of random mathematical theorems and proofs, which it used to approximate general rules of geometry. The AI then applied these rules to solve the Olympiad problems and show its workings for humans to check. The researchers hope their system shows that it is possible for AIs to ‘learn’ basic principles from large amounts of data and use them to tackle complex logical challenges, which could prove useful in fields outside mathematics.Research article: Trinh et al.09:46 Research HighlightsA stiff and squishy ‘hydrospongel’ — part sponge, part hydrogel — that could find use in soft robotics, and how the spread of rice paddies in sub-Saharan Africa helps to drive up atmospheric methane levels.Research Highlight: Stiff gel as squishable as a sponge takes its cue from cartilageResearch Highlight: A bounty of rice comes at a price: soaring methane emissions12:26 The food-web effects of mass predator die-offsMass Mortality Events, sometimes called mass die-offs, can result in huge numbers of a single species perishing in a short period of time. But there’s not a huge amount known about the effects that events like these might be having on wider ecosystems. Now, a team of researchers have built a model ecosystem to observe the impact of mass die-offs on the delicate balance of populations within it.Research article: Tye et al.20:53 Briefing ChatAn update on efforts to remove the stuck screws on OSIRIS-REx’s sample container, the ancient, fossilized skin that was preserved in petroleum, and a radical suggestion to save the Caribbean’s coral reefs.OSIRIS-REx Mission Blog: NASA’s OSIRIS-REx Team Clears Hurdle to Access Remaining Bennu Sample Nature News: This is the oldest fossilized reptile skin ever found — it pre-dates the dinosaursNature News: Can foreign coral save a dying reef? Radical idea sparks debateSubscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday.