Physics The biggest threat to Chernobyl is no longer radiation Forty years after the world’s biggest nuclear disaster, the safety of Chernobyl hangs in the balance – though not because of the radiation risk News
Physics Quantum entanglement can be measured in solids for the first time A method that relies on hitting materials with neutrons can measure how much quantum entanglement hides within them, which could enable new kinds of quantum technology News
Environment Are manure digesters a real solution to dairy farm emissions? Anaerobic digesters converting manure to biogas reduce methane emissions from livestock, but incentives for them have encouraged factory farms to get bigger News
Technology Startling images show how fake news isn't just a 21st century issue From huge geese to flying cars, these photographs from a new exhibition at the Rijksmuseum reveal how we have been manipulating images for over a century Regulars
Physics Exclusive report: Inside Chernobyl, 40 years after nuclear disaster Âé¶¹´«Ã½ reporter Matthew Sparkes secured unrivalled access to Chernobyl's most crucial scientific sites, where researchers are fighting to protect the area and ensure it remains safe amid the constant threat of attack from Russia Features
Space What to read this week: Emma Chapman's mind-expanding Radio Universe An imaginative and compelling book reveals how radio waves help us tune in to our universe – and even search for alien civilisations, says Karmela Padavic-Callaghan Culture
Health Iodised salt has become uncool but many of us need to eat more iodine Iodine deficiency is on the rise among people in the UK, the US and Australia. A century ago this led to drops in IQ, height and thyroid health – and the modern fancy salt fad may be leading to a resurgence, says columnist Alice Klein Comment
Comment Why cloning anyone – even Jim Carrey – isn't the best plan ever Feedback discovers that a conspiracy theory has formed that various celebrities have been replaced by clones, and sees just a few small problems with the idea Regulars