World’s oldest woman, 115 years old, swears by this one rule for a long life

Ethel Caterham, the world's oldest woman at 115, shares her secret to longevity. Born in 1909, she advises avoiding arguments and prioritizing personal happiness. Her life includes travels to India, Hong Kong and Gibraltar. Studies show emotional well-being links to longer life. Ethel's story highlights the importance of calmness, balance, and joy for a fulfilling life.