 Although some of the pieces require purchasers to be a qualified user—those intending to use the pieces for "research, educational, medical or therapeutic purposes"—many pieces, including animal testicles and baby chicks, require no authorization.There are also extremely realistic plastinate impressions of human hearts and slices (including one slice of copulating humans) for sale to the general public.The success of "Body Worlds" has given rise to several similar shows featuring plastinated cadavers, including "BODIES...