Most of the images below are “original” enough to be copyright protected. Many are released via open Creative Commons licenses. Others are dedicated to the public domain. Following good practice (and licensing requirements), we have provided the proper credit and attribution for each of the images used.
Executive Summary: “Colección de cucharas y utensilios de Ernesto Richheimer,” Museo Soumaya, CC BY-SA
Introduction: “Portrait of an unknown man, half figure, between 1841-67, colored, quarter plate daguerreotype in case,” by Antoine Francois Jean Claudet (1797-1867), Preus Museum, No known copyright restrictions
Background and History: “Harmonic Reed Corporation Spitz Junior Planetarium,” Science History Institute, Public Domain Mark
Building Copyright Consensus: “Bird Head Drawing 716,” Robert Ridgway, Smithsonian Institution Archives, No known copyright restrictions
Clarifying “Open”: “Diary entry for 11 November 1918, from the diary of Louis Llewyllen Lent,” Provincial Archives of Alberta, No known copyright restrictions
Declaration Draft: “Mätbrygga,” Flygvapenmuseum, CC BY
Public Consultation: “Een gedroogd exemplaar van Acanthaster planci (Linnaeus, 1758) (Doornenkroon),” Museon, CC BY