Never argue: 115-year-old British woman, now the world's oldest, gives her recipe to long life

For Ethel Caterham, the trick to a long life — and in her case, it really has been — is not to argue. Caterham, who is 115, became the world's oldest living person, according to the Gerontology Research Group, after Sister Inah Canabarro, a Brazilian nun and teacher, died on Wednesday at the tender age of 116. In 1927, at the age of 18, Ethel embarked on a journey to India, working as a nanny for a British family, where she stayed for three years before returning to England, according to the GRG.