Belgian animal sculptor Emmanuel Janssens Casteels works on a replica of a Smilodon's skull, an extinct genus of machairodont felid, in his workshop in Prayssas December 3, 2014. Casteels' company OPHYS specializes in life-size reconstructions and the sculpting or moulding of reproductions of animals and hyper-realistic fossils. His reconstructions are exhibited in museums and theme parks. REUTERS/Regis Duvignau (FRANCE - Tags: SOCIETY ANIMALS)