EarthEarth has a mysterious triple symmetry that may influence its climate A circle running along the 27° east and 153° west meridians divides the globe into two halves with equal reflectivity – and this may have implications for solar geoengineering schemes News
HealthHow ageing on Earth mimics the effects of space travel Life on the International Space Station may feel distant, but columnist Graham Lawton finds that studying how astronauts experience accelerated ageing could help us fight similar effects on Earth related to sedentary lifestyles, disrupted circadian rhythms and social isolation Comment