It is astonishing to realise that the human species survived hundreds of thousands of years, more than 99 percent of its time on this planet, with a life expectancy of only eighteen years. — Leonard Hayflick Copy Share Image
A fruitfly is ancient in 40 days, a mouse at 3 years, a horse at 30, a man at 100, and some species of tortoises not until 150 years. — Leonard Hayflick Copy Share Image
It is astonishing to realise that the human species survived hundreds of thousands of years, more than 99 percent of its time on this… — Leonard Hayflick Copy Share Image
