A biological DNA clock to slow ageing process and fight cancer has been developed by scientists.
The DNA clock compares biological "age" of body tissue to a person's age in years, the Mirror reported.
The DNA clock had been discovered embedded in genomes that is that a person's complete genetic make up, and may help scientists find why humans age and how aging process can be slowed.
It was found that healthy female breast tissue is 2-3 years older than other tissues in the body.
However, tissue close to tumours was 12 years older and the tumour tissue themselves were 36 years older, which could help reveal why breast cancer is the most common cancer in women and why age has become the major risk factor for many cancers in both genders.