One Twin Went To Space For a Year, When He Came Back The Changes Were Compelling

Age and Telomeres

The ends of the chromosomes are a key indicators how physical old a person is. When we are children, they tend to be very long. As we age, the telomeres shrink more and more. Then we become more vulnerable to age-related problems. Scott’s telomeres had shrunk considerably, indicating rapid aging of his internal physical DNA.