VideoMagic trick reveals sharp memory and future planning in Eurasian jays Jay's response to magic tricks show cognitive abilities that may come into play when they pilfer food caches hidden by other birds. Video
LifeNo more goody two shoes: Why true altruism can’t exist If only the fittest survive, why do good deeds for no return? The enduring mystery of altruism goes to the heart of how evolution does – and doesn't – work Features