By Tristram D. Wyatt (Senior Research Associate, Department of Zoology, University of Oxford)
By Dominic Couzens, Philip Snow, Tony Disley
By Peter J. Simmons (University of Newcastle upon Tyne), David Young
By Jonathan Balcombe
By Richard Dawkins (Emeritus Fellow of New College, Oxford.)
By Carl Safina
By D.R. Kershaw
By Sarah Gibson
By Mike Toms
By Hannah Molloy
By R. M. Lockley
By Richard D. Estes, Edward O. Wilson, Daniel Otte
By Paul Martin, Patrick Bateson (Professor Sir, King's college, Cambridge)
By Victoria Stilwell
By Andrew F. Fraser, Donald M. Broom, Donald F. Broom