In contrast to many other mammals, cetaceans have relatively small hippocampi that appear to lack adult neurogenesis - Nina Patzke; Muhammad A. Spocter; Karl Æ. Karlsson; Mads F. Bertelsen; Mark Haagensen; Richard Chawana; Sonja Streicher; Consolate Kaswera; Emmanuel Gilissen; Abdulaziz N. Alagaili; Osama B. Mohammed; Roger L. Reep; et al. (Brain Structure and Function, 2015)