Contributed Paper: C. Gordon Winder
C. Gordon Winder,
Department of Earth Sciences
University of Western Ontario, London,
Canada, N6A 5B7
WHAT IS LIFE? DEFINE LIFE.
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In the literature on the science/religion debate, numerous references are made
to the 'origin of life'. I started pondering - well before we can talk about the
origin of life we must have a comprehensive definition of LIFE. What is life?
Definitions in dictionaries are very unsatisfactory. Students taking biology
classes could not define. I began to search the literature and found that a
specific definition is usually lacking. The following, published in the UWO
Western NEWS, October, 24, 1996 summarizes my research, provides a definition of
LIFE, and a brief summary of comments.
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The debate in the United Kingdom about the disposal of frozen embryos raises
once again two questions - What is Life? What is the Origin of Life? These
embryos in their present frozen state are not alive and therefore do not possess
life. Only if they are implanted do they have the potential of developing into a
living human being, who has life.
In addition, a potato-size rock fragment with an age of four billion years,
found in Antarctica twelve years ago, and identified as originating on Mars,
contains microscopic structures, suggesting primitive life-forms.[See GSA
TODAY, July 1997,p.1] Are they? Just what is life? {Since first composing this
essay, more doubt has been expressed that these structures are the remains of
living organisms, and probably inorganic structures.}
In 1993, I organized at the biennial International Society of History,
Philosophy, and Social Studies on Biology (ISHPSSB) conference at Brandeis
University, Waltham, Massachusetts, a symposium entitled - WHAT IS LIFE? DEFINE
LIFE, as a preliminary step in yet another attempt to examine the beginnings or
origin of life. In preparation, definitions from several dictionaries were
compiled. Most were considered useless. A
multitude of books and articles were searched and a list of 22 definitions were
assembled. An article by J.B.S. Haldane, published in 1947 entitled "What is
Life?" opened with the statement 'I am not going to answer the question- ' but
he did include a critical aspect incorporated in the definition below. The
ISHPSSB membership was invited through the NEWLETTER to submit definitions of
less than 150 words. The submissions were disappointingly few, and some so long
and complex, using
technical language, I considered them incomprehensible- technical language, I
considered them incomprehensible.
Before the conference, the definitions from dictionaries, books, articles, and
personal submissions were distributed to the contributors, and at the
conference. At the session after a preliminary statement by the organizer, the
discussion was vigorous, dominated by three orfour individuals. Every >
individual in the audience was asked to make a statement, and a couple were most
helpful; reluctance to speak by some individuals at a group meeting is a common
characteristic. One participant was most verbose until the organizer intervened
and terminated his interjections, as he seemed determined defining LIFE should
be avoided. Two concepts did emerge but not with unanimous agreement. 1) A free
living single cell, such as an amoeba, is alive and therefore exhibits life. 2)
A virus which can exist only within another organism, is not alive so does not
exhibit life.
Subsequent to the meeting, on the basis of the compiled definitions and the
meeting discussion, the following definition of LIFE was composed.
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LIFE is a succession of energy-producing ELECTRO-CHEMICAL PROCESSES by a
naturally occurring, simple or complex organism composed of a combination of
molecules, each consisting or systematically arranged carbon, hydrogen, and
oxygen atoms, and a few other elements, forming cells, which consume 'food' and
produce 'waste', both consisting of solid, aqueous, and gaseous matter; the
process is called METABOLISM; the organism is capable of living within the
environment without dependency on any other organism; energy use is manifest by
growth with size limits for
most; self-healing; possibly movement; self-replication with each offspring
slightly
different; irritability; capable of modifying their living environment, both
beneficially and detrimentally; with eventual termination of energy production,
or death. Exceptions are egg, sperm, spore, seed, and virus, which do not
consume food and produce waste; the first four are replication structures, and
the fifth has premature life-terminating capabilities. (about 146 words) Revised
96-08-26.
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Does this definition have any official status such as endorsement by a
professional scientific, philosophical, legal, government, or other
organization? NO! The purpose for publishing is to draw attention to the fact
that a rational discussion about the beginnings or origin of LIFE, demands that
a comprehensive definition of LIFE is a pre-requisite. This should also hold
for the debate about those frozen human
embryos, and microscopic structures in a piece of rock which is presumed to
have come from Mars. Otherwise the only fruits of the debate are an
increase in the carbon dioxide content of the atmosphere.
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The following summarizes "letters-to-editor" and comments of
correspondents.
1. One individual attempted to 'hi-jack' for his own political agenda.
2. A full page diatribe filled with obfuscation, sarcasm,
ridicule, etc.
My response was request the writer to provide his definition of
LIFE. No response.
3. The definition of a second year biology student in high-tech
language " -- perpetuating a system of linked
organic reaction catalysed -- ".
A chemistry professor responded to this "Why not
just say Life is organic chemistry?"
4. A biologist - Life is sensing, experience, wonderment, beauty, etc.
My response was - Do these address the origin of LIFE?
No response.
5. A correspondent observed that my definition does not cover tape worms.
I asked if this was sufficient to invalidate my definition? No response.
6. A Presbyterian minister - "Life is a sexually transmitted disease that is
always terminal".
7. R.C. priest(retired) - "I am overwhelmed by your all encompassing
definition. I will ponder over it for a bit ---". Several months, now years
later, and he is still pondering.
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This definition now allows the question - WHAT ACTUALLY HAPPENED WHEN LIFE
ORIGINATED? There is also the question - WHERE did LIFE originate? A common
tendency is -- OUT THERE, and then transported to Earth!! That merely begs the
question about the origin of LIFE. I believe that LIFE originated here - on
Earth, and not elsewhere. The American astrophysicist, Harlow Shapley described
Earth as a grain of sand, with a whiff of atmosphere, a film of water, and a
smear of biology, plodding its way around the sun with monotonous regularity.
Another question is WHEN did LIFE originate? The oldest rocks on earth with
fossils have a date of about 3.7 billions of years.
Then there is the question - did LIFE originate by Chance or Design? A basic
assumption of the entire spectrum of scientific research is to establish order,
or system, or a classification from which predictions can be made. In his book
The Blind Watchmaker, Richard Dawkins wrote on the final page (p.317) "The true
explanation for the existence of life must embody the very antithesis of
chance". Allow me to state in the positive - the existence of life must embody
design!
Darwin's biological evolution does not deal with the >origin< of life, and he
stated so in his ORIGINS book - just the succession of living organisms after
LIFE was created.
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