The Guardian view on ageing research: our lives have more distinct phases than we thought | Editorial
Ageing occurs in long stable phases interrupted by abrupt inflection points across organs, with the brain showing five eras and extended adolescence to age 32.
Ageing accelerates around age 50 some organs faster than others
The findings add to mounting evidence that ageing is not linear, but is instead pockmarked by periods of rapid change. Some tissues, especially blood vessels, age faster than others.