From Elizabeth Carrey, Tiverton, Devon, UK
Even among humans, with our inferior olfactory senses, some of us can taste and detect scents better than others. Does the hunt for human pheromones take into account that some people may be better at emitting and/or receiving these signals? On a similar note, I have always been intrigued by the idea that menstrual cycles can be synchronised among groups, which has defied proof. Here, again, perhaps a “dominant” transmitter in the group emits a chemical signal to other members (27 January, p 35).
