Biologists have noticed a positive correlation between the protein sirtuin and cellular longevity. Moreover, as we age, the levels of NAD go down steadily. Turritopsis dohrnii is also known as the "immortal jellyfish." The process of cellular trans-differentiation means that one type of cell in the body can transform itself into another type of missing cell in the body. Adult stem cells induced to become embryonic stem cells are known as induced pluripotent stem cells (iPS cells). CRISPR can be used to repair DNA. Cas9 is an example of CRISPR that functions like a police officer to protect the cell's DNA. Some bowhead whales live past 200 years! Terror management theory is used by people facing death.
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