Age is rarely defined by a single number. Researchers typically categorize it in three ways: The number of years passed since birth.
Historically set around 65, though many countries are raising this as life expectancy increases. 🚀 The Future of Aging how old are you
How old your cells and organs seem based on health markers. Age is rarely defined by a single number
Usually 18, granting the right to vote and sign contracts. how old are you