You probably know that your cells must divide and multiply so that your body can grow and repair itself. Well, a scientist named Leonard Hayflick discovered that there is a LIMIT to how many times they can divide. That number, which is now called the "Hayflick Limit," is around 50. So that means that every cell in your body comes into being, grows old,dies,and is replaced by another! If you're 30, nearly ALL the cells you had at 15 have been replaced!
So, the question..are you still you? how do you know?
2006-09-22
12:12:50
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18 answers
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asked by
prometheus_unbound
3