The World, the Universe and Us

New Scientist

From the evolution of intelligent life, to the mysteries of consciousness; from the threat of the climate crisis to the search for dark matter, The world, the universe and us is your essential weekly dose of science and wonder in an uncertain world. Hosted by journalists Dr Rowan Hooper and Dr Penny Sarchet and joined each week by expert scientists in the field, the show draws on New Scientist’s unparalleled depth of reporting to put the stories that matter into context. Feed your curiosity with the podcast that will restore your sense of optimism and nourish your brain. For more visit newscientist.com/podcasts

  1. 18 HR AGO

    Mathematics is Undergoing the Biggest Change in its History

    Episode 351 Artificial intelligence is starting to solve mathematical theorems better than humans. Mathematicians say AI is now an existential threat to their work. As one professor puts it; “We are running out of places to hide.” From winning gold medals at mathematics competitions, to solving previously unanswered Erdős problems, multiple AI achievements have come together recently to exceed all expectations of its capabilities. Find out just how quickly the tech is advancing, how we can tell the AI isn’t just hallucinating answers, why it may help us formalise all of mathematics - and whether it will really put humans out of a job. And 10 years on since Google’s AlphaGo AI first beat human Go master Lee Sedol, we reflect on that epic moment and hear from Chris Maddison who saw it all unfold. Rowan Hooper is joined by New Scientist’s Alex Wilkins to discuss “one of the most remarkable stories” he’s ever worked on. Chapters (00:00) Intro - The biggest moment in the history of mathematics (01:10) The many problems AI is now solving (04:11) Are these models similar to ChatGPT or Claude? (05:09) Will AI help us advance the field of mathematics? (07:28) How can we check AI’s answers - are they just hallucinations? (10:51) Why it’s important to “formalise” maths (12:03) Will we become too reliant on this AI? (13:00) 10 years on since AI beat Lee Sedol at Go (14:54) AI creativity: The famous ‘Move 37’ (16:50) How it felt to watch this epic moment (19:21) How AlphaGo led to the LLMs of today (20:25) Are regular chatbots becoming more creative? To read more about these stories, visit https://www.newscientist.com/ Learn more about your ad choices. Visit megaphone.fm/adchoices

    24 min

  2. 2 DAYS AGO

    The Radical Theory That Could Force Us To Rethink Alzheimer’s

    Episode 350 What If Alzheimer’s disease starts in the body, not the brain? A radical new theory upends everything we thought we knew about the disease. Alzheimer’s is the most common form of dementia - the leading cause of death in the UK. And for 100 years we believed it all happened in the brain. Despite all of the major symptoms of Alzheimer’s being brain related, scientists studying gene activity have discovered something surprising. Most risk variants for the disease appear in the skin, lungs and gut - not the brain. This could mean the leading suspects of the disease - amyloid plaques and tau proteins - may not be to blame. But if not them, then what? Rowan Hooper is joined by New Scientist’s Australia reporter Alice Klein to discuss the findings. Chapters (00:00) Intro - A radical new understanding of Alzheimer’s (01:23) Why amyloid and tau treatments aren’t proving effective (02:16) How gum and dental health is linked to Alzheimer’s (03:09) Could proteins in the brain be a protective feature? (03:56) Why amyloid and tau really aren’t the full picture (04:35) Why scientists have gone back to the drawing board (05:37) Does Alzheimer’s start in the skin, lungs and gut? (06:14) Alzheimer’s risk genes found in the immune system and barrier tissues (07:12) Where inflammation fits into the puzzle of Alzheimer’s (09:10) The role of the blood brain barrier (10:00) How have scientists responded to these findings? (10:58) What other health conditions are linked to Alzheimer’s? (12:08) Preventative measures you can take to reduce your Alzheimer’s risk (15:03) How reframing diseases leads to better treatments To read more about these stories, visit https://www.newscientist.com/ Read the latest New Scientist CoLab article: https://newscientist.com/eternal Learn more about your ad choices. Visit megaphone.fm/adchoices

    18 min

  3. 5 DAYS AGO

    We Now Have Early Warning Signal Of Ocean Current Collapse

    Episode 349 One of the most vital systems of ocean currents - needed to keep life in northern Europe stable - is at risk of collapse. And now we can predict when it’s going to happen. Thanks to the work of climate scientists, we now have a model that tells us when major shifts in the Atlantic Meridional Overturning Circulation (AMOC) are expected. The AMOC is the Atlantic conveyor belt that keeps northern Europe temperate. If it turns off, northern Europe would be plunged into freezing conditions that would decimate agriculture and upend life as we know it. And it’s becoming clear that it is already weakening. Rowan Hooper is joined by climate journalist Alec Luhn. Together they explain how the AMOC and gulf stream work, why fears of a “tipping point” have been growing in recent years, and how this new model helps us prepare for the worst. Also hear from climate scientist René van Westen, who co-authored the report in Nature. To read more about these stories, visit https://www.newscientist.com/ Listen to the latest episode of New Scientist CoLab: https://newscientist.com/eternalpod  Learn more about your ad choices. Visit megaphone.fm/adchoices

    25 min

  4. 5 MAR

    Two 'Extinct' Mammals Species Have Been Discovered in New Guinea

    Episode 348 Thought extinct for 6,000 years, two marsupial species have been discovered alive in New Guinea. Biologists have found a new genus of marsupial glider and the Pygmy Long-fingered Possum on a small Western part of the island. One biologist said this discovery was “more important than finding a living Thylacine in Tasmania”. Host Rowan Hooper is joined by Tim Flannery of the Australian Museum in Sydney, who led the team that confirmed the discovery. He tells us all about these quirky and cute creatures, one of which is held up as sacred by some Indigenous communities - who won’t even utter its name in public. Learn about the glider’s habit of forming monogamous relationships and its gardening prowess. And discover why the long-fingered possum’s finger is so long. Other key players in this research are Professor Kris Helgen, multiple researchers from the University of Papua - and some of the local villagers. To read more about these stories, visit https://www.newscientist.com/ Glider image credits: Dewa, Australian Museum Other image credits: Flannery et al Learn more about your ad choices. Visit megaphone.fm/adchoices

    19 min

  5. 27 FEB

    How Ukraine Became a Drone Factory - and Changed Warfare Forever

    Episode 347 Drones have taken over the battlefield in Russia’s war on Ukraine. Tens of thousands of drones are being produced every day - operating as kill vehicles for both sides. Multiple types are being deployed, including flying artillery drones and ground drones. Now the deadliest war since World War 2 - and considered the first “drone war” - the conflict is being fought in a way unlike we’ve ever seen before. With more than 80 per cent of military hits now made by drones. So on this special edition of the podcast we ask: is this the future of warfare?  Driving these vehicles is in some ways like playing a video game, with operators sitting behind a screen with a handheld controller. And the gamification goes beyond this, with drone operators earning “points” for kills - that can be cashed in for more military equipment. AI is increasingly used to guide drones and to analyse targets.  Joining hosts Rowan Hooper and Penny Sarchet are Matt Sparkes, who’s recently returned from a drone factory in Ukraine, and Serhii Andriev, Deputy Company Commander of “Kraken” 3rd Army Corps drone regiment.  The team also hear from Andrii Hrytseniuk, CEO of Ukraine government organisation Brave 1 - and Trusta, an Ukrainian engineer and drone pilot trainer. To read more about these stories, visit https://www.newscientist.com/ Learn more about your ad choices. Visit megaphone.fm/adchoices

    20 min

  6. 20 FEB

    The world is running out of water - can cloud-seeding save us?; Why some people get stuck in grief; Is our black hole actually a clump of dark matter?

    Episode 346 The world is running out of water, with many countries suffering from significant water shortages. We’re now having to rely on groundwater that takes thousands of years to replenish – so what can we do? One group says, to save us from worldwide “water bankruptcy”, we need to artificially change the weather. Although “cloud-seeding” has been around for a long time, a new technique is getting big results in the US. But the idea is becoming increasingly controversial – with cloud-seeding held responsible for recent floods in Dubai and Texas. So will this help, or hurt? Grief is a very normal experience for those who suffer a loss. But for 1 in 20 of us, this intense sadness doesn’t go away. “Prolonged grief disorder” was recognised as a distinct psychiatric condition in 2022 – but it was controversial, with some concerned we’re pathologising a normal human response. But new research suggests there really are unique things happening in the brains of those suffering from PGD. Could this help us find better ways to treat the condition? Is the black hole in the centre of our universe actually a massive clump of dark matter? It seems ridiculous to ask, but the new theory is genuinely worth investigating. Researchers say Sagittarius A* is just the right size that it could defy everything we think we know about it. Could we have an answer to the puzzle of dark matter, right on our doorstep? Hosted by Penny Sarchet and Timothy Revell, with guests Alec Luhn, Alexandra Thompson and Leah Crane. To read more about these stories, visit https://www.newscientist.com/ Learn more about your ad choices. Visit megaphone.fm/adchoices

    31 min

  7. 13 FEB

    How ancient humans crossed the vast ocean; Brain training for dementia; Life of science legend Maggie Aderin

    Episode 345 More than 8,500 years ago, ancient people crossed the ocean to the remote island of Malta for the first time. Long before compasses or sails were invented, these prehistoric people navigated the seas on logs, using the stars to travel vast distances. Recent findings show we’ve long underestimated the voyaging capabilities of stone-age hunter-gatherers. We discuss the many examples of ancient travel - and what this all tells us about the ancient mind. Could just one hour of brain training a day be enough to stave off dementia? For the first time, an intervention against dementia has been tested in a randomised control trial. Lasting an impressive 20 years, participants in the trial played a brain training game for just a few hours a week - and the results were remarkable. The legendary space scientist Maggie Aderin joins the show to discuss her new book, Starchild: My Life Under the Night Sky. The Sky at Night presenter discusses her motivation for writing a memoir, how her love of astronomy came about, what it was like as the only Black woman in her university class, her time working on the James Webb telescope - and more. Hosted by Rowan Hooper and Penny Sarchet, with guests Maggie Aderin, Michael Marshall and Alexandra Thompson.To read more about these stories, visit https://www.newscientist.com/ Learn more about your ad choices. Visit megaphone.fm/adchoices

    40 min

  8. 6 FEB

    Why Elon Musk plans to put 1 million satellites in orbit; Should we be giving sleep drugs to kids?; Why global pesticide risk is not improving

    Episode 344 Elon Musk has announced he wants to merge SpaceX with another of his companies, xAI, and launch one million satellites into space. One reason - according to Musk - is to eventually harness the entire power of the sun, a sci-fi sounding idea that would make us a Kardashev Type II civilisation. But he also wants the satellites to help power AI and move data centres off Earth. Is his goal realistic… and what would be the consequences? Parents desperate to get their children to sleep are resorting to melatonin gummies - and it’s proving very effective. Melatonin is a sleep hormone which is only available on prescription in many countries. So some parents are importing them from America - where they can be bought over-the-counter. The trouble is the long-term side effects are not really known - and cases of melatonin overdose in children are on the rise. Despite global agreement to cut the "overall risk" from pesticides by at least half by 2030 - new data shows we’re not even close. Countries made this commitment at a UN biodiversity meeting in 2022, but so far it’s been almost impossible to measure success. Thanks to a researcher in Germany, we now have a way to track our progress - and it’s not looking good. Could an increase in organic farming be the solution, or CRISPR gene editing? Hosted by Rowan Hooper and Penny Sarchet, with guests Jonathan O’Callaghan, Alice Klein and Michael Le Page. To read more about these stories, visit https://www.newscientist.com/ Learn more about your ad choices. Visit megaphone.fm/adchoices

    38 min
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About

From the evolution of intelligent life, to the mysteries of consciousness; from the threat of the climate crisis to the search for dark matter, The world, the universe and us is your essential weekly dose of science and wonder in an uncertain world. Hosted by journalists Dr Rowan Hooper and Dr Penny Sarchet and joined each week by expert scientists in the field, the show draws on New Scientist’s unparalleled depth of reporting to put the stories that matter into context. Feed your curiosity with the podcast that will restore your sense of optimism and nourish your brain. For more visit newscientist.com/podcasts

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