Physicists Develop Model that Describes Length Growth in Biological Systems

'Grandmother, why do you have such big ears?' is one of the most well-known questions in literature, posed of course by Red Riding Hood as she hesitantly observes the wolf dressed in her Grandmother's clothes. Had Red Riding Hood been a physicist, she might well have asked: 'Grandmother, why are your two ears exactly the same length?' Scientists have been aware of this 'length problem' for a long time, but it was largely overlooked for most of the twentieth century.