A long postreproductive life span is a shared trait among genetically distinct killer whale populations oleh Mia Lybkær Kronborg Nielsen, Samuel Ellis, Jared R. Towers, Thomas Doniol‐Valcroze, Daniel W. Franks, Michael A. Cant, Michael N. Weiss, Rufus A. Johnstone, Kenneth C. Balcomb III, David K. Ellifrit, Darren P. Croft