A state in which an organism or a cellular system, as defined by its full set of functionality, ceases to exist (i.e., most of the functions are irreversibly lost).

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What does it mean when it's said so-and-so died a natural death?

It is oft said that, so-and-so died a natural death. What does it mean? Is it a direct-causeless death? Meaning doesn't natural death have any cause? Or just that it is unknown and hence a natural ...
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Lethality of a stab wound to the back

How deadly is a stab in the back? Video games, movies, and other fiction would have us believe that a backstab against a foe with a modestly-sized blade leads to immediate and certain death, having a ...