HealthNew techniques may soon make designer babies a reality – are we ready? As tests that screen embryos for complex traits become available, it's time to decide how to use these ethically – and where to draw the line Leader
EnvironmentThe male fish who eat their eggs because they want better babies When male barred-chin blenny fish are unimpressed by their latest batch of offspring, they often eat them so they can start a new family as soon as possible News