The discovery of ancient clades of brittle stars at the bottom of the Pacific Ocean adds to concerns that commercial exploitation of the area could destroy numerous taxa before they’ve even been identified.

Signatories of the declaration say the need for governments to act on human-driven climate change is too urgent to stay silent.

The first phylogenomic tree of these insects shows their diversification occurred after they split into Old and New World groups.

Glass eels form a magnetic memory of their estuaries’ currents in order to migrate.

Small RNAs called piRNAs provide a first line of defense against the viruses.

Back from the brink of near-extinction, the Kirtland’s warbler population has grown and expanded its range.

A type of jumping spider called Afraflacilla had never been documented in India—until now.

A mysterious illness is causing tissue loss in many species.

A frog performs a balancing act in a region where amphibians are threatened.