In 1912 chicken heart cells were kept alive in a test tube for the next 34 years. This experiment was interesting, particularly since chickens usually only live for 3 to 5 years. However, the chicken’s heart cells lived much longer than the chicken that once owned them. It proved that cells are immortal under the right conditions, and this was done by using a strategy that was simple. The heart cells were kept in mineralized water that was changed every 48 hours, so that the heart cells were always living in a solution that was rich in minerals and clean. The experiment was terminated after 34 years, but the lessons about life extension and cell life last forever.