Stark evidence of shrinking rhino horns sparks survival warning walesonline.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from walesonline.co.uk Daily Mail and Mail on Sunday newspapers.
Scientists believe shooting rhinos with larger horns means only smaller-horned ones remain, who then pass on their smaller traits; the animals are endangered, with less than 30,000 in the wild.