Technology Bitcoin has become an environmental, as well as financial, disaster We should be celebrating bitcoin's downfall. What began as an interesting experiment now consumes enough electricity to power 4 million US homes News
Health Phone app can diagnose anaemia from photos of fingernails Fingernails - a window into your blood health A smartphone app can diagnose anaemia by analysing the colour of a person’s fingernails in a photograph. Anaemia – a condition in which people have low levels of haemoglobin or not enough healthy red blood cells – affects over two billion people worldwide. If untreated, it can … News
Comment We have all we need to beat the HIV epidemic – except political will The latest figures show that preventative efforts are working, if only governments are willing to put them into action, says Deborah Gold News
Earth Dan Holdsworth captures a vanishing landscape in a point-cloud Armed with drones, helicopters and military-grade software, a British photographer has developed a new way to remember glaciers Regulars
Physics If you think black holes are strange, white holes will blow your mind White holes are black ones in reverse, spewing out matter– and they could give us our first glimpse of the quantum source of space-time, says physicist Carlo Rovelli Features
Humans Darkfield's Flight: an immersive experience that leaves you half dead In the sylvan surroundings of Dartington Hall, the pioneers of immersive theatre are exploring the many-world interpretation of quantum mechanics, one air crash at a time Culture
Sponsored How clever chemistry is making plastic fantastic again Plastic waste threatens a wide range of ecosystems all over the planet. But innovative ways of making, reusing and recycling plastic are set to change our relationship with this extraordinary material basf
Feedback: The President of Nigeria is (almost certainly) not a clone Feedback is our weekly column of bizarre stories, implausible advertising claims, confusing instructions and more Regulars