A hydrodynamic model of fish swimming in a channel predicts a critical flow speed for fish to successfully swim against a flow, unveiling a passive mechanism for rheotaxis to emerge without access to any sensory information.

Molecular, cellular and behavioral genetic approaches in Platynereis dumerilii indicate that r-Opsins can act as ancient, light-dependent modulators of mechanosensation, and suggest that light-independent mechanosensory roles of r-Opsins evolved secondarily.

Mapping single-cell atlases throughout Metazoa systematically characterizes cell type diversity and the evolution of their associated gene expression programs.

Lineage tracing at single-cell resolution reveals the presence of mesoteloblasts, the embryonic origin of mesodermal growth zone cells, and diverse cell cycling patterns of these lineages in the 'Polychaete' annelid Platynereis.

The Drosophila lateral horn, a higher olfactory brain area, contains >165 genetically defined cell types with stereotyped odour responses across animals and improved odor categorisation compared with their inputs.