Researchers are studying three Brazilian sisters who have all lived to be over 100 years old. The goal of this research is to gain insight into what contributes to a long and healthy life.

By examining the lives of these exceptionally long-lived individuals, scientists hope to learn more about the factors that enable people to remain physically and mentally resilient well into old age.

Further information on this study can be found in the Waco Tribune-Herald, which reports on the efforts of scientists to understand longevity through this unique case.