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 51¶¯Âþ
HumansMissing Y chromosome kept us apart from Neanderthals An analysis of a Neanderthal Y chromosome suggests human hybrids containing it would have been unviable, and explain why it is not found in modern humans 51¶¯Âþ