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The Guardian

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

Science Weekly

For decades physicists have been puzzling over the enigma of dark matter. We think it makes up 85% of the matter in the universe, but the mysterious substance cannot be seen or detected, and we know about it mainly through observations of the gravitational effects it has on other things. But now scientists believe they may be a step closer to detecting it. Science editor Ian Sample explains to Madeleine Finlay why, if confirmed, the finding could completely transform our understanding of the universe. And Dr Samuel Eriksen, senior research associate at the University of Bristol, and first author of the research paper, explains how the finding has been received in the physics community. Help support our independent journalism at theguardian.com/sciencepod

‘One of the biggest discoveries in science’: have scientists found dark matter?

Who’s more likely to steal sweets from a child? According to science, it’s the rich. A study seemingly confirming our suspicions about the moral behaviour of the wealthy was one of the winners of the 2026 Ig Nobel prizes, which honour research that makes you laugh and then think. Science editor Ian Sample tells Madeleine Finlay what the researchers think could be behind the phenomenon, and they explore some of the other awards, including one for a surprising quality we look for in our friends and another for a biomechanical definition of kissing. Help support our independent journalism at theguardian.com/sciencepod

Are rich people really worse behaved? Here’s the science

From the Guardian Investigates team: Across the world, hundreds of people have come to believe they have made extraordinary scientific discoveries with AI chatbots such as ChatGPT, Claude and Gemini. Others say their AI has ‘awakened’ or is leading them to a higher spiritual realm. The Guardian journalist Michael Safi begins investigating a phenomenon labelled ‘AI psychosis’, travelling to the US to meet two people who have been on weird journeys with their chatbots. Help support our independent journalism at theguardian.com/sciencepod

Introducing Black Box: The Chatbots

Methane is a potent greenhouse gas that traps more than 80 times as much heat than carbon dioxide over a 20-year period and causes 25% of global heating today. We definitely don’t want this gas spewing needlessly into the atmosphere, but in 2023 that’s exactly what environment editor Damian Carrington found was happening when he reported on 1,000 super-emitting methane leaks across the globe. Now Turkmenistan, the worst country for mega-leaks, has begun to plug them. Damian tells Madeleine Finlay why some experts call stopping leaks the climate ‘emergency brake’ and reveals which countries are still failing to act. Help support our independent journalism at theguardian.com/sciencepod

There’s a quick way to slow climate change. Why isn’t everyone doing it?

Ever since the earliest known recording of whale song was made in 1949, researchers have been captivated by the wails, rumbles, clicks, grunts and squeals of their communication. As technology improves, scientists are decoding the intricate patterns that make different species’ vocalisations distinctive. Madeleine Finlay hears from Emma Bryce, a journalist who has spent months investigating human efforts to understand whale song. She explains how this knowledge could help us better protect whales from human-made harms. Credits: 1. Copyright 1978 National Geographic Society and 1977 Capitol Records, Inc. Commentary by Dr Roger Payne 2. Valeria Vergara/Raincoast Conservation Foundation 3. Footage courtesy of Raincoast Conservation Foundation - Obtained for research under SARA permit XMMS 4 2026 4. Video by Amanda Cotton/Project CETI 5. Footage courtesy of Valeria Vergara and GREMM. Obtained for research under SARA permits QUE-MM02-2016 and QUE-LEP-001-2018 6. Project CETI 7. Project CETI. Help support our independent journalism at theguardian.com/sciencepod

Could humans ever communicate with whales?

AI companies have promised us world-shifting technology. But there’s a cost: loud, unsightly datacentres that drain environmental resources. As the government pushes their rapid growth, can local communities do anything to push back? Madeleine Finlay speaks to the Guardian’s global technology reporter Aisha Down about the backlash to datacentres across the UK and around the world. Help support our independent journalism at theguardian.com/sciencepod

Everyone hates datacentres. Do we really need them?

Creatine has become the go-to supplement for anyone wanting to give their fitness a boost and build muscle. It’s even made it out of the gym, with influencers touting its cognitive benefits. But what’s the science behind creatine, and does the evidence stack up? Madeleine Finlay hears from science editor Ian Sample and Dr Justin Roberts, professor of nutritional physiology at Anglia Ruskin University. Help support our independent journalism at theguardian.com/sciencepod

Creatine: is there truth behind the hype?

After a summer that has seen England and Wales experience the driest July since records began, rain is finally on the horizon. But with reservoirs at ‘exceptionally low’ levels, will there be enough rain to replenish stocks? Madeleine Finlay hears from Dr Anna Murgatroyd, a lecturer in hydrology at Newcastle University, about how much rain we need to see us through next summer, why we’re now at increased risk of floods, and what we can all be doing to take better care of our water supplies. Help support our independent journalism at theguardian.com/sciencepod

It’s finally raining. Will it be enough to end the drought?

One of the UK’s best fossil collections has been sold overseas in what experts have called a loss to the nation. The collection, which is now on display at the Natural History Museum in Abu Dhabi, was gathered on Dorset’s Jurassic Coast. As dinosaur fossils sell to private collectors for increasingly large sums, scientists are worried that domestic museums are being priced out of the market, and in turn scientists are missing out on the opportunity to make new observations. To find out how fossils became big business and what it could mean for research, Madeleine Finlay hears from science correspondent Nicola Davis. Help support our independent journalism at theguardian.com/sciencepod

The ultra rich are collecting fossils, and that’s bad for science

Each year the Guardian runs a competition to find the invertebrate of the year. To find out more about the 2026 nominees science editor Ian Sample hears from climate reporter Petra Stock, environment reporter Oliver Milman and Science Weekly co-host Madeleine Finlay. They each nominate an incredible invertebrate that you might never have heard of, and argue why their choice should be crowned the winner. Vote for your favourite now and the winner will be crowned on 17 August. Help support our independent journalism at theguardian.com/sciencepod

The immortal jellyfish and other mindblowing invertebrates

The trillions of microbes living on and inside the human body are an important part of who we are, from mediating all of our interactions with the environment to determining our cancer risk and influencing who we fall for. And scientists are only just beginning to decipher the species of bugs we share our lives with, and how they shape us. In the final part of this Science Weekly mini-series, Ian Sample meets Julie Thornton, academic director of the Centre for Skin Sciences and professor in cutaneous biology at the university of Bradford. Julie tells Ian how the skin microbiome varies across our bodies, how it helps with everything from wound healing to immunity, and how we can protect it from the disruptive impact of modern life.. Help support our independent journalism at theguardian.com/sciencepod

Secrets of the microbiome: the skin

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