Paleontology. Unhatched eggs help dinos get a head.
Stokstad
E
E
D000818:Animals; D001118:Argentina; D005075:Biological Evolution; D004625:Embryo, Nonmammalian / Q000033:anatomy & histology; D005580:Fossils; D012104:Reptiles / Q000196:embryology*; D012886:Skull / Q000196:embryology*