How much faith should we be putting in artificial intelligence? As large language models and generative AI have become increasingly powerful in recent years, their makers are pushing the narrative that AI is a solution to many of the world’s problems. But Meredith Broussard says we’re not there yet, if we even get there at all. Broussard is the author of More than a Glitch: Confronting Race, Gender, and Ability Bias in Tech. She coined the term “technochauvinism,” which speaks to a...

#246 Our best climate models for helping limit global warming to 1.5oC may have wildly overestimated our chances. To reach this goal, models are relying heavily on geological carbon storage, a technology that removes carbon from the atmosphere and places it underground. But it may not be nearly as effective as models have suggested, making the task of decarbonising much more difficult. Do we need to rethink our approach? Intel has announced it has constructed the world’s biggest computer...

How do you destroy a black hole? Turns out they're pretty tough cookies. Kicking off a brand new series of Dead Planets Society, Chelsea Whyte and Leah Crane take on the universe's most powerful adversaries. With the help of their cosmic toolbelt and black hole astronomer Allison Kirkpatrick at the University of Kansas, they test all the destructive ideas they can think of. Whether it’s throwing masses of TNT at it, blasting it with a t-shirt gun full of white holes, loading it up with a...

#245 The multiverse may be bigger than we thought. The idea that we exist in just one of a massive collection of alternate universes has really captured the public imagination in the last decade. But now Hugh Everett’s 60-year-old “many worlds interpretation”, based on quantum mechanics, has been upgraded. The northern white rhino is on the brink of extinction but we may be able to save it. Scientists plan to use frozen genes from 12 now dead rhinos to rebuild the entire subspecies. But how...

Half of the human population undergoes the menstrual cycle for a significant proportion of their lifetimes, yet periods remain a taboo topic in public and private life. And that makes it harder both to prioritise necessary scientific research into conditions like endometriosis and for people to understand the basics of how their bodies work. Blood: The Science, Medicine, and Mythology of Menstruation is gynaecologist Jen Gunter’s latest book. In this practical guide, she dispels social,...

#244 Researchers have successfully turned lymph nodes into miniature livers that help filter the blood of mice, pigs and other animals – and now, trials are beginning in humans. If successful, the groundbreaking medical procedure could prove life-saving for thousands of people waiting for liver transplants around the world. So far, no complications have been seen from the procedure, but it will be several months before we know if the treatment is working as hoped in the first of 12 trial...

This is a re-airing of a podcast originally released in March 2021. From beetle explosions to the deep dark depths of the ocean, this episode is all about escape. The team discusses the amazing (and sometimes disgusting) way bombardier beetles escape predators. They explain what it takes for an object to reach escape velocity, celebrating the mathematical mind of Katherine Johnson while they’re at it. And they explore the daunting realms of free-diving, and the lengths people will go to for a...

#243 As we age our immune systems do too, making us less able to fight infections and more prone to chronic inflammation. But a team of scientists has been able to reverse these effects in mice, rejuvenating their immune systems by targeting their stem cells. But there’s a long road to trying the same thing in humans. Have you seen the incredible new black hole image? Just a couple of years since the Event Horizon Telescope’s first, fuzzy image of Sagittarius A* – the black hole at the centre...

Fish you wear like a gas mask, moss that turns a robot sentient and critters that will eat your rash – all these oddities and more cohabit on the planet Vesta, the setting for the animated miniseries Scavengers Reign, where a group of human space travellers must innovate with what they find in the landscape to survive. While all this sounds fantastical, there are many parallels with Earth’s ecosystem and the way we regularly borrow technology from the natural world.  New Scientist physics...

#242 Human population growth is coming to an end. The global population is expected to peak between 2060 and 2080, then start falling. Many countries will have much lower birth rates than would be needed to support ageing populations. These demographic projections have major implications for the way our societies function, including immigration and transportation, and what kinds of policies and systems we need.  Remember Rosie the Robot from The Jetsons? Humanoid robots capable of many...

This is a re-airing of a podcast originally released in March 2021. From the quickest animal in the world to the fastest supercomputer, this episode is all about speed. Opening with the cries of the peregrine falcon, the team finds out how the bird has evolved to endure flying at more than 200mph. Then they explain how scientists, starting from Galileo, attempted to measure the speed limit of the universe, the speed of light, and how Einstein understood what it meant. And they explore the...

#241 More than 2 million Palestinians in Gaza face widespread hunger, disease and injury as the war quickly becomes the worst humanitarian crisis in modern memory. Even once the war ends, the devastating physical and emotional health consequences will be felt for many years to come, especially by children. And aid groups like UNICEF and the World Health Organization have no long-term plans to meet the post-war health needs of the population. Gravity on Mars may occasionally be strong enough...

There’s no moon like our moon. A celestial body twinned with Earth, the moon guides the tides, stabilises our climate, leads the rhythms of animal behaviour and has long been a source of wonder and awe.  Our Moon: How Earth's Celestial Companion Transformed the Planet, Guided Evolution, and Made Us Who We Are, is a new book from science journalist Rebecca Boyle. In it she takes an intimate look at our satellite and how it’s influenced everything from our species’ understanding of long cycles...

#240 A major step has been made toward bringing woolly mammoths back from extinction – sort of. The company Colossal has the ambitious goal of bringing its first baby mammoth into the world by 2028. And its newest advance, announced this week, is in turning adult Asian elephant cells into stem cells. But it’s still a long way from here to the company’s vision of cold-adapted elephants fighting climate change in the Arctic – or even that 2028 baby mammoth.  When did humans begin to affect the...

This is a re-airing of a podcast originally released in February 2021. Keeping you cosy this week is an episode all about warmth - emotional, physiological and geological. We have an unexpected start to the show, with bees taking the spotlight, but it turns out these cold-blooded little insects can generate immense warmth when necessary. The team then takes a much bigger view of warmth, discussing the heat of the planet, and of the many uses of geothermal energy. Finally they wrap up by...

#239 Two decades ago, following the Human Genome Project’s release of a first draft in 2001, genetic testing was set to revolutionise healthcare. “Personalised medicine” would give us better treatments for serious conditions, clear pictures of our risks and individualised healthcare recommendations. But despite all the genetic tests available, that healthcare revolution has not exactly come to fruition. Amid news that genetic testing poster child firm 23andMe has hit financial troubles, we...

Freezing temperatures, dust storms, radiation, marsquakes – living on Mars right now would be hellish. And getting there remains a multi-year journey. But what if we could make it habitable? Could we one day build settlements on the Red Planet or send human scientists to search for life? That’s the premise of the TV series For All Mankind, which explores a future where the space race continued after the moon landing and humanity kept spreading out across space. But in the name of a good...

#238 ADHD is a condition that affects millions of people and is marked by impulsivity, restlessness and attention difficulties. But how did ADHD evolve in humans and why did it stick around? Through the help of a video game, a study shows that these traits might be beneficial when foraging for food.  In 2023, we hit record after record when it comes to high temperatures on Earth, including in the oceans and seas. From the surface to 2000 metres down, it was hard to find a part of the ocean...

This is a re-airing of a podcast originally released in February 2021. Prepare to feel relaxed, tingly and amazed all in the space of 20 minutes. This episode is all about sound. We start with the musical tones of an elephant trumpeting, followed by a recording from Cornell University’s Elephant Listening Project, showing how they communicate at an infrasonic frequency, which humans can’t ordinarily detect. The team then attempts to send shivers down your spine by recreating ASMR, explaining...

#237 Glaucoma, which can cause blindness by damaging the optic nerve, may be reversible. Researchers have managed to coax new optic nerve cells to grow in mice, partly restoring sight in some. How the treatment works through an eyeball injection and why, for humans, prevention and early detection are still the best options. Black holes, just like planets and stars, spin. But they may be spinning a lot slower than we thought. When black holes gobble up matter around them, they start spinning...

Real tech billionaires are reportedly building secret bunkers in case of post-apocalyptic societal collapse. It’s a frightening prospect, a world where only the super rich survive catastrophe. But it’s a world one author is exploring in her latest novel. Naomi Alderman is the prize-winning and best-selling author of The Power. Her latest book The Future imagines a world where billionaires survive a world-shaking cataclysm, only to find out they’re not as in charge of events as they think they...

#236 This week marks two major milestones in the world of fusion. In 2022 a fusion experiment at the Lawrence Livermore National Laboratory created more power than was required to sustain it – now, the same team has improved this record by 25 per cent, releasing almost twice the energy that was put in. Meanwhile, the UK’s JET reactor set a new world record for total energy output from any fusion reaction, just before it shut down for good late last year. Why these two milestones inch us...

This is a re-airing of a podcast originally released in February 2021. From some of the lightest creatures on earth, to the heaviest things in the cosmos, this episode is all about mass. It’s a magical opening to the show as the team discusses a group of insects called fairy wasps which are so light it’s near impossible to weigh them. They then turn to matters of massive proportions, discussing a little thing called dark matter. Finally the team wraps up by looking at the surprising, and...

#235 In very rare cases, Alzheimer’s disease could be transmitted from person to person during medical procedures. This finding comes as five people have developed the disease after receiving contaminated human growth hormone injections in the late 1950s to early 1980s – a practice that is now banned. What this finding means for medical settings and why most people don’t need to be concerned.   Elon Musk’s mind-reading brain implant company Neuralink is carrying out its first human trial. The...