Cetaceans have complex brains for complex cognition
Citation
Marino , L , Connor , R C , Fordyce , R E , Herman , L M , Hof , P R , Lefebvre , L , Lusseau , D , McCowan , B , Nimchinsky , E A , Pack , A A , Rendell , L , Reidenberg , J S , Reiss , D , Uhen , M D , Van der Gucht , E & Whitehead , H 2007 , ' Cetaceans have complex brains for complex cognition ' , PLoS Biology , vol. 5 , no. 5 , e139 . https://doi.org/10.1371/journal.pbio.0050139