If you were to ask your grandparents a secret diet to a long life, sand and gravel will surely not be on the menu. However, Kusma Vati from Varanasi, an 80-year-old woman in India has left many shocked after she admitted that she has been eating sand and gravel for the last 65 years. According to her, she was 15-years-old when she first ate sand and gravel to ease an upset stomach. There has been no looking back since then, sand and gravel have become a part of her diet. Many people, her grandchildren included...