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What is Life? SERIES Meet Marty!🙆🎬

54 views · Published 3 October 2016 · 3:00 · Indexed 20 October 2026

Channel: Trenius Henderson · 2016 · Howto & Style

Derived from stardust, the elements in your body exhibit no special properties. Carbon is carbon. Nitrogen is nitrogen. Atoms are just atoms, so the old premise that life is made of some special stuff is wrong. But more modern efforts to describe life fall short, too. The most recent edition of the Encyclopaedia Britannica offers a typical definition of life as a “state characterized by the ability to metabolize nutrients (process materials for energy and tissue building), grow, reproduce, and respond and adapt to environmental stimuli.” At first, that sounds perfectly reasonable, but the Britannica definition is in fact completely inadequate, as has been every previous attempt.

The Characteristics of Life

Broadly speaking, the following characteristics are usually invoked in various orders and degrees to define life: autonomy; reproduction; stability, change and evolution; resistance to entropy; conversion of matter and energy; metabolism; excretion; movement; autopoiesis; homeostasis; complexity; organization; growth and development; respiration; responsiveness; the presence of a genetic code. The fatal flaws in each of these characteristic called upon to define life all fall into just three simple categories: the traits assigned to life are present in some non-living systems (like growth, in crystals), the traits assigned to life are absent in some living systems (movement - think of sponges), or the traits can only be determined or defined across generations (like evolution or reproduction), depriving us of the ability to determine if the beast before us is alive or not. Every single character or trait that has been used to define life suffers from one or more of these three deficiencies. http://www.huffingtonpost.com/jeff-schweitzer/what-is-life_b_9638396.html

Written By: Jeff SchWeitzer

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