The human pelvis exhibits distinct spatiotemporal ossification patterns and an ilium cartilage growth plate that is shifted perpendicularly compared with those of other mammals and non-human primates—...

The forelimbs of two Late Cretaceous theropod dinosaurs show the presence of the pisiform bone, previously thought to have been lost early in theropod evolution and regained in birds during the evolut...

Fossil data shed light on a debate about when vertebrate dental tissues arose by assigning an early sensory structure to arthropods rather than to vertebrates.

Re-examination of the presumed Cambrian fossil fish Anatolepis reveals previous misidentification of aglaspidid sensory structures as dentine, a vertebrate sensory tissue, showing it to be a...

Analysis of the 'Chicago' Archaeopteryx, a nearly complete and uncrushed specimen, reveals details of the skeleton, soft tissues and plumage of this taxon, providing information on the evolution to av...

Synovial joints are characterized by lubricated articular surfaces separated by a cavity, providing mobility and load-bearing, but when did they evolve? This comparative and developmental study reveal...

A multi-institutional research team that includes UC San Diego biologist Kim Cooper has been awarded a $1 million grant from the W.M. Keck Foundation to study the role of inflammation in animals, whic...

The Sauka-Spengler Lab explores the blueprint and circuitry driving cells

An increasing number of evolutionary studies seek to quantify the morphological complexity of organisms, particularly those comprising serially homologous elements at different hierarchical levels of ...

Information for the NSF community regarding executive orders.

Metabolism has been considered an attractive candidate as a global modulator of the tempo of multiple developmental processes, including somite segmentation timing. Here they demonstrate that metaboli...

YouTube video by Stowers Institute for Medical Research

The function of two genes, Sonic hedgehog and Fibroblast growth factor 8, have changed greatly during amniote facial evolution. The expression of these genes can explain variation in the proportion of...

The 2025 Gordon Research Seminar on Neural Crest and Cranial Placodes (GRS) will be held in Lucca (Barga), Lucca Italy. Apply today to reserve your spot.

X-ray analysis of bony scale shows vertebrates developed ability to remodel and repair bone much earlier than thought

Abstract. How developmental modifications produce key innovations, which subsequently allow for rapid diversification of a clade into new adaptive zones, h

Our findings support sensitivity to low-frequency sound in the archaeocete Zygorhiza kochii and an early toothed mysticete cf. Aetiocetus. Narrow-band high-frequency hearing was present in Oligocene ...

Despite the functional importance of the vertebral skeleton, little is known about how individual vertebrae elongate or achieve disproportionate lengths as in the giraffe neck. Rodent tails are an abu...