Cranial endocasts, infillings of the skeletal void that once contained the brain and associated soft tissues, represent detailed anatomical structures that have long been the focus of paleontologica
To identify genes critical for vascular development, we generated mice where ETV2 is inactivated in FLK1+ cells by a loxP-Cre recombination approach. Results provide a detailed insight into the funct
Presence (+) and absence (-) of pneumatic characters found on the caudal vertebrae from specimens of the 11 taxa studied. The penguin with the pneumatised vertebrae is Pygoscelis papua (NHMUK unregist
