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Extreme heat is already the most common cause of weather-related hospitalisations in Australia and with heatwaves intensifying, our climate and environment correspondent Graham Readfearn put his body to the test in an experiment. In a climate chamber at the University of Sydney, he walked on a treadmill while temperature conditions were constantly adjusted, adding direct sunlight and higher humidity. Graham joins Nour Haydar to talk about how extreme heat affects us, our cognitive functions and our chances of survival

Barack Obama has caused a frenzy after saying he thinks aliens are real during a podcast interview. The former US president was forced to release a statement clarifying he had not seen any evidence of extraterrestrials. There is a long-running conspiracy theory claiming the US government is hiding extraterrestrials at Area 51, a highly classified air force site in Nevada. Lucy Hough speaks to the host of the Guardian’s Science Weekly podcast, Madeleine Finlay

As Australians watch Donald Trump continue to crack down on immigrants, a private prison company used by ICE in the US is now running detention centres in Australia. In the US, the company faces allegations of ‘gross negligence’, and in Australia, staff inside the detention centres have highlighted safety concerns, including a rise in sexual assaults. Reged Ahmad talks to chief investigations correspondent Christopher Knaus and investigations reporter Ariel Bogle about the growing scrutiny over the Albanese government’s decision to put the company in charge of Australia’s detention regime

A recent survey has painted a damning picture of the bullying and abuse some of Australia’s coaches, referees and club officials face each week on the field – and parents are responsible for almost half of it. Sports reporter Jack Snape tells Reged Ahmad about the impact of poor parental behaviour on grassroots sport

Every Sunday, we’ll bring you some of the Guardian’s best stories from the week. Stories we loved, that made us feel happy, sad, or just made us think, read out by the people who wrote them. This weekend, unsettled by how angry our world has become, journalist and author Brigid Delaney explores what we can do to break the contagion of rage we’re seeing in our everyday lives