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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Why do only humans commit suicide?

Why is it that only humans commit suicide? Many animals do 'brave' things to protect their children or family, and some male spiders sacrifice themselves so that they can impregnate the females. ...
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Why is living muscle tissue seemingly able to restore its shape under force, while dead tissue is not?

When I press my finger, even with relatively little force, into beef or chicken (say, at a grocery store), the indentation remains (and I get yelled at by employees). When I hit beef with a ...
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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 ...