ChemistryWhy quasicrystals shouldn’t exist but are turning up in strange places Matter with “forbidden” symmetries was once thought to be confined to lab experiments, but is now being found in some of the world’s most extreme environments Features
HumansDoes the family tree of ancient humans need a drastic rewrite? Anthropologist Christopher Bae has recently suggested we add two new species of ancient human to our family tree. The plans break the conventions for how species should be named – but Bae argues the rules themselves are flawed Features