title: New developmental clock discovered.
authors.forename: E
authors.initials: E
authors.lastname: Pennisi
mesh_terms: D000818:Animals; D001683:Biological Clocks / Q000235:genetics*; D005075:Biological Evolution; D002642:Chick Embryo; D018507:Gene Expression Regulation, Developmental; D008648:Mesoderm / Q000502:physiology; D019170:Somites / Q000166:cytology*