The 12th-century English chronicler Ralph of Coggeshall relates a strange story: two lost and distressed children appeared in a local village, speaking a language no-one could understand, and, most strikingly, with strangely green-coloured skin. [more inside]
Romulus and Remus are the most famous, and Rochom P'ngieng is the most recent addition to the roster of children believed to be raised by animals (via, and previously).
Feral Children? Some of this has to be fiction... but even so, it still makes for interesting reading. Some links to media from the BBC and other sources.
Feral children have fascinated linguists, psychologists, anthropologists, and filmmakers for over a century. Read about the Wild Boy of Aveyron, Kamala and Amala (raised by wolves), and Genie (chained and locked in a closet until she was 13) and you'll discover how fragile humanity can be when "nature" overruns "nurture."