A duo of paleontologists from San Diego State University and the San Diego Natural History Museum has explored the transition from raptorial feeding in early baleen whales (Mysticeti) to filter-feeding in living species. An artist’s reconstruction of Aetiocetus weltoni. Image credit: C. Buell. “A strange phenomenon happens with modern blue whales, humpback whales and gray whales: they have teeth in the womb but are born toothless,” said Dr....