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This is the theory that lifeless matter came together to form a living organism. Also known
as the theory of Spontaneous Generation, this idea has persisted since the Middle Ages.
(Also see Spontaneous generation.)
In Medieval times, it was widely accepted that maggots were generated from food scraps,
clothe moths from wool and mice from wheat! Interesting experiments were devised to prove
this belief. One 17th-century physicist by the name of J.B. Van Helmont thought that
if he spread a few grains of wheat on a dirty cloth, mice would be generated. And when maggots
appeared in rotting meat, they were regarded as proof that life could arise from lifeless
matter.
Only later was it understood that maggots did not come about spontaneously, but from
the nearly microscopic eggs that adult flies laid on the meat.
The theory of spontaneous generation was shown to be totally false by the famous 19th-century
French scientist, Louis Pasteur, who summarized his findings in this triumphant sentence:
Never will the doctrine of spontaneous generation recover from the mortal blow struck by this
simple experiment. Today the theory of abiogenesis has been discarded
in favor of the theory of biogenesis, which holds that life comes from only from life.
(See: Biogenesis.) But some evolutionist circles that still defend the idea that life was formed
long ago from some chance combination of lifeless matter.
But they have been unable to prove their claims scientifically, and their attempts to do so
have been inconclusive.