EarthA globetrotting, water-saving tour of sewage gardens Would you dine in an artificial wetland laced with human waste? In The Wastewater Gardener, Marc Nelson makes an inspiring case for a new ecology of water CultureLab
LifePsychedelic cells are fruit of Alan Turing's equations It looks like living cells – but this image evolved in a computer following an algorithm based on Alan Turing's ideas about the patterns on animals' bodies Regulars