Juan Manuel Borrero / Illustration of human evolution from left to right Australopithecus afarensis, Australopithecus africanus, Homo erectus and Homo sapiens. Pencil and watercolor painting.

Jose B. Ruiz / Cast of footprints of early man {Australopithecus} Olduvai gorge museum, Tanzania Serengeti,

Paul D Stewart / M. Boitard's drawing of a simian fossil man was published after his death in the 1861 book 'Paris Avant Les Hommes' (engraving by Moreau). The book places his time-travelling author in other epochs to...