By Safina, Carl
By Penny, Malcolm
By Rachels, James
By Desmond Morris
By Jonathan Balcombe
By Elizabeth Shreeve, Frann Preston-Gannon
By Justin Gregg
By Ross Piper
By Jared M Diamond
By Frans de Waal (Emory University)
By Thomas Suddendorf
By Richard Fortey
By Godfrey-Smith, Peter
By Holland, Peter
By DK
By Anderson, Walter Truett
By Cooke, Lucy
By Morris, Desmond
By Durrani, Matin, Kalaugher, Liz
By Darwin, Charles, Ekman, Paul
By WOLFE, Alan
By Lesnoff, Matthieu, Lancelot, Renaud, Moulin, Charles-Henri, Messad, Samir, Juanès, Xavier, Sahut, Christian
By Mellanby, Helen
By Budiansky, Stephen
By Darwin, Charles
By Wilkes, Sarah
By Richard O Prum
By Paul R. Ehrlich, Anne H. Ehrlich