LifePutting bigger brains down to our social nature is half-bakedNew work on primates bolsters the idea that diet – rather than social complexity – was key to evolution of our big brains, says chimp expert Richard WranghamComment
HealthGood hydrations: Is tea or coffee better for you? Coffee has the edge when it comes to stimulation, but tea’s all-round health benefits make it a winner – except there’s another story brewing Features