A centenarian is a person who has reached the age of 100 years or older. This milestone is celebrated in many cultures, often highlighting the individual's life experiences and wisdom. The number of centenarians has been increasing globally due to advancements in healthcare, nutrition, and living conditions. Centenarians are often studied in fields like gerontology, which focuses on aging and the challenges faced by older adults. Researchers examine factors that contribute to longevity, such as genetics, lifestyle choices, and social connections. Some regions, known as Blue Zones, have higher concentrations of centenarians, providing insights into healthy aging.