The main consumer-targeted certification scheme for sustainable fisheries is failing to protect the environment and needs radical reform, say Jennifer Jacquet, Daniel Pauly and colleagues.

A charitable deed by a few cells in a bacterial culture can help the rest of that population survive in the presence of antibiotics. This finding can aid further research into a major problem in public health.

Presenilin proteins have a major role in normal cellular processes, but some contribute to disease, for example through the formation of amyloid-?. The way in which these different roles are regulated is now becoming clearer.