Cetaceans are fully aquatic marine mammals belonging to the order Artiodactyla and branched off from other artiodactyls around 50 mya (million years ago). Cetaceans are thought to have evolved during ...

Despite these adaptations, cetaceans retain key features of ... column is now the main part of the skeleton driving locomotion in an aquatic environment." The vertebral column of terrestrial ...

“The regression of brain-case sinuses in thalattosuchians mirrors that of cetaceans, reducing during their semi-aquatic ...