EnvironmentSmallest perching bird’s long-lost family revealed by genetics The pygmy bushtit was thought to be the only surviving species of its genus. Now genetics is showing that it’s not so different from its larger cousins ¿ìè¶ÌÊÓÆµ
HumansThe truth about migration: How evolution made us xenophobes Multicultural societies are more harmonious and successful, but to make them work we must fight our evolved tendencies to mistrust migrants Features