Carbon-Based Life
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Carbon forms the backbone of biology for all life on Earth. Complex molecules are made up of carbon bonded with other elements, especially oxygen, hydrogen and nitrogen, and carbon is able to bond with all of these because of its four valence electrons. It is often assumed in astrobiology that if life exists somewhere else in in the universe, it will also be carbon based. This assumption is referred to by critics as carbon chauvinism. In cinematic and literary science fiction, a moment when man-made machines cross from nonliving to living, is often posited, this new form would be the first exa...
Carbon forms the backbone of biology for all life on Earth. Complex molecules are made up of carbon bonded with other elements, especially oxygen, hydrogen and nitrogen, and carbon is able to bond with all of these because of its four valence electrons. It is often assumed in astrobiology that if life exists somewhere else in in the universe, it will also be carbon based. This assumption is referred to by critics as carbon chauvinism. In cinematic and literary science fiction, a moment when man-made machines cross from nonliving to living, is often posited, this new form would be the first example of non-carbon-based life. Since the advent of the microprocessor in the late 1960s, these machines are often classed as computers (or computer-guided robots) and filed under "silicon-based life", even though the silicon backing matrix of these processors is not nearly as fundamental to their operation as carbon is for "wet life"
