Remains of the oldest relative of the Tyrannosaurus Rex - who walked the earth 230 million years ago - have been unearthed in Brazil . Named Erythrovenator, the prehistoric beast was about six-and-a-half feet long with razor sharp teeth and claws and bristles. It is the most primitive of its kind ever discovered. Palaeontologist Dr Rodrigo Muller, of the Federal University of Santa Maria, Brazil, said: 'It is one of ...