By Stephen Beech & Rom Preston-Ellis Cavemen may have been vegan for long periods, suggests a new study. Early humans are traditionally depicted as feeding on hunks of meat. But new research shows that a wide range of plant-based food – such as acorns, pine nuts and wild pulses – made up a “significant” part of the diet of cave dwellers in North Africa thousands of years ago. An international team of French, German and Moroccan scientists examines the diet of people associated with the Iberomaurusian culture discovered in the cave of Taforalt in present day Morocco. Using state of the art tech…