Researchers from Nagoya University, Japan recently investigated the skulls and cervical skeletons of 56 existing aquatic mammals. They analyzed the range of motion performed by the joint between the head and neck of the aquatic species to analyze their feeding behaviors.The research revealed a difference in feeding behavior among whales and dolphins. So far, scientists have used teeth, throat bones and lower jaws to examine the feeding behaviors of extinct aquatic mammals. However, researchers believe analyzing the range of motion of the joints could help to fetch more accurate details of extinct aquatic mammals feeding behaviors.
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