Rhino horn fetches nearly $30,000 a pound, more than crack cocaine, and conservationists worry that this “ridiculous price,” as one wildlife manager put it, could drive rhinos into extinction. http://www.nytimes.com/2013/01/01/world/africa/ruthless-smuggling-rings-put-rhinos-in-the-cross-hairs.html?ref=ivory In an instant, an entire Chadian squad of rangers was cut down with alarming precision by elephant poachers who were skilled at killing more than…