Science Weekly

Science Weekly

Podcast door The Guardian

Twice a week, the Guardian brings you the latest science and environment news

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episode Why are parents using melatonin to help their kids sleep? artwork
Why are parents using melatonin to help their kids sleep?

Guardian feature writer Rhiannon Lucy Cosslett recently wrote about the growing cohort of parents whose children are on the waiting list for an autism or ADHD diagnosis, and are turning to the internet to buy melatonin to help them sleep. She tells Madeleine Finlay about their experiences and what is driving them to the hidden market. Paul Gringras, a consultant in paediatric sleep medicine and neurodisability, and lead of sleep medicine at King’s College London, also explains why melatonin can be helpful for neurodivergent children and why he is concerned about the increasing number of parents looking for it online. Help support our independent journalism at theguardian.com/sciencepod [https://www.theguardian.com/sciencepod]

15 jul 2025 - 17 min
episode Texas floods and forecasting cuts: a sign of things to come? artwork
Texas floods and forecasting cuts: a sign of things to come?

In the days since the deadly floods in the Texas Hill Country, speculation has grown about whether cuts to US weather agencies may have contributed to the the number of casualties. Ian Sample talks to the meteorologist and climate journalist Eric Holthaus to find out whether this narrative stacks up and what the consequences could be for extreme weather prediction in the future. Help support our independent journalism at theguardian.com/sciencepod [https://www.theguardian.com/sciencepod]

09 jul 2025 - 16 min
episode What are microplastics doing to our health? artwork
What are microplastics doing to our health?

The actor Orlando Bloom recently posted a photo of himself undergoing a £10,000 procedure at a London clinic that claims to remove microplastics, forever chemicals and herbicides from the blood. But how settled is the science around the health risks of microplastics? To find out, Ian Sample speaks to Dr Stephanie Wright, associate professor of environmental toxicology at Imperial College London’s school of public health. She explains what we know so far about the effects of microplastics in the body, why the science is still evolving, and what we can do to reduce our exposure. Help support our independent journalism at theguardian.com/sciencepod [https://www.theguardian.com/sciencepod]

08 jul 2025 - 15 min
episode Why British women are freezing their eggs abroad artwork
Why British women are freezing their eggs abroad

The number of women choosing to freeze their eggs has increased sharply, according to figures from the UK’s Human Fertilisation and Embryology Authority (HFEA). The number deciding to embark on the process abroad also appears to be rising. Madeleine Finlay speaks to the Guardian journalist Lucy Hough, who recently travelled to Brussels to freeze her eggs. She explains what prompted her decision and how she feels now that the procedure is over. Madeleine also hears from Joyce Harper, a professor of reproductive science at University College London, about what the freezing of eggs involves and why the small odds of success could be driving women to travel to do it. Help support our independent journalism at theguardian.com/sciencepod [https://www.theguardian.com/sciencepod]

03 jul 2025 - 18 min
episode What does it take to make a nuclear weapon? artwork
What does it take to make a nuclear weapon?

In an interview last weekend, Iran’s ambassador to the UN said his country’s nuclear enrichment ‘will never stop’ because it is permitted for ‘peaceful energy’ purposes. It is the latest development in an escalation of tensions over Iran’s nuclear programme, which erupted when Israel targeted the country’s nuclear facilities in June. To understand why enrichment is so important, Madeleine Finlay talks to Robin Grimes, professor of materials physics at Imperial College London. He explains what goes into creating a nuclear weapon, and why getting to the stage of weaponisation is so difficult. Help support our independent journalism at theguardian.com/sciencepod [https://www.theguardian.com/sciencepod]

01 jul 2025 - 15 min
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