Viviane Callier

Some animal neuropeptides have been around longer than nervous systems.

Large blocks of genes conserved through hundreds of millions of years of evolution hint at how the first animal chromosomes came to be.

New studies reveal the ancient, shared genetic “grammar” underpinning the diverse evolution of fish fins and tetrapod limbs.

A new study of gene expression in sponges reveals the complex diversity of their cells as well as some possibly ancient connections between the nervous, immune and digestive systems.

The evolution of a defensive gland in beetles shows how organs can arise from novel cells carving out new functional niches for their neighbors.

Animals sculpt the optical properties of their tissues at the nanoscale to give themselves “structural colors.” New work is piecing together how they do it.

New work shows that histones, long treated as boring spools for DNA, sit at the center of the origin story of eukaryotes and continue to play important roles in evolution and disease.

Unusual proteins that can quickly fold into different shapes provide cells with a novel regulatory mechanism.

In grafted plants, shrunken chloroplasts can jump between species by slipping through unexpected gateways in cell walls.