Health Our five appetites mean our hunger is far more complex than we thought It is crucial to understand your five-appetite system and how ultraprocessed foods have crashed this set-up – especially as they are so popular in lockdown News
Health Shock therapy temporarily improves woman’s colour blindness The Ishihara colour perception test A shock of electricity to the temples can be a powerful, last-resort treatment for some people who have mental health conditions that don’t respond to other treatments. But it can have surprising side effects – it seems to have improved the colour vision of a woman with colour blindness in … News
Environment Algae transplant could protect coral reefs threatened by warming seas greenpeace-future-gbr
Life The strange physics of why blue jays look blue even though they aren't Watching birds is great entertainment, and there's fascinating physics behind how some get their colours, says Chanda Prescod-Weinstein News
Environment The epic journeys of green sea turtles revealed by 50 years of data Using more than 50 years of satellite tracking data, a team found that green sea turtles will skip areas they don't know when looking for a foraging site even if they are suitable Regulars
Health You have five appetites, not one, and they are the key to your health Forget the idea of a single drive to eat – you have evolved distinct appetites for various foods. This makes it easier to eat exactly what you need, and helps explain the obesity epidemic Features
Technology Telling Lies review: A twisting mystery for the age of video calls Can you solve a mystery by sifting through video calls? Telling Lies Sam Barlow and Furious Bee PC, PlayStation 4, Xbox One, Nintendo Switch, Mac, iOS The man on screen is looking straight at me, speaking into the camera. My attention drifts to his surroundings in an attempt to learn more about his life. It … Culture
New Scientist puzzle #60: Mexican standoff Can you work out who will be left standing at the end of a spaghetti western shoot-out? Plus the solution to puzzle #59. Set by Rob Eastaway Regulars
How to solve one of the world’s hardest maths problems for under $25 Feedback is our weekly column of bizarre stories, implausible advertising claims, confusing instructions and more Regulars