Environment We should pursue speculative climate solutions like quantum batteries A new kind of battery rooted in quantum effects is showing promise. No one knows if they will ever become a practical option for electric vehicles or solar-power storage. But as the world burns, potentially transformative ideas must be explored News
Space NASA made enough oxygen on Mars to last an astronaut for 100 minutes NASA’s MOXIE experiment on Mars has produced about 100 minutes’ worth of breathable oxygen, raising hopes for future crewed missions News
Health There are thousands more UK deaths than usual and we don’t know why Since April, there have been 22,500 more deaths than expected in the UK. Health experts are concerned but unsure of the causes – which could include covid-19, population ageing and NHS problems News
Space Remastered Apollo mission photos are simply out of this world Half a century after the last person walked on the moon, original footage has been digitally overhauled to show NASA's lunar missions in a new light Regulars
Health Beyond tired: Why fatigue sets in and how to tackle it A renewed focus on fatigue in light of long covid means we now have a better understanding of the body-brain pathways that cause it, offering fresh targets for new treatments Features
Life Two new books about sharks reveal how and why we should conserve them Paul de Gelder's Shark and David Shiffman's Why Sharks Matter aim to turn the all-too-common public panic about the predator into interest in their conservation Culture
Puzzle #184: Can you solve this rather unusual addition sum? Can you solve this week’s arithmetical challenge, Cipher sum? Plus the answer to puzzle #183 Regulars
How to boil an egg so the yolk ends up on the outside of the inside Feedback reports on important new egg-related research, as well as delving into exhaustive egg and tadpole-tasting studies from years gone by Regulars