Scientifically ageing happens when cells slow down the process of dividing till they die. A piece of DNA called a telemere when controlled called a halt to the division. The telomere keeps getting shorter after each cell division but also prevents the DNA from fraying each time. But eventually it is too short to help! And the cell dies.
Believe it or not, scientists claim to have reversed the process in the lab by genetically creating an enzyme which can rebuild telomeres. This enzyme is found only in sperm and egg cells. If this can be introduced into cells, it should mean a halt to cell death. The big question is how does one insert genes into a cell?
Time will tell.